When DC introduced the Golden Age Superman, they made the (eminently
reasonable) decision to stress the differences between that character and
the Silver Age Superman, hence the name 'Kal-L', the position at The Daily
Star, and the lack of a career as Superboy. This decision deliberately
ignored the fact that all of these elements of the character had changed
to the more familiar Silver Age characteristics by the early 40's. Jerry
Boyajian informed me regarding:
... the switchover from Clark & Lois working at the Daily Star to
the Daily Planet. This happened (in the comics) in the two-part  story in
Action Comics #22 (March 1940) and #23 (April 1940). In the first part,
they were working for the Star, and in the second,  they were working for
the Planet. In actuality, the "switchover" from the Star to the Planet
first occurred in newspaper strip  continuity. The last time the Daily
Star was mentioned was in daily strip #239: 10/20/39, in the story arc
"Royal Deathplot"  (#163-258: 7/24/39-11/11/39). Clark was, however,
erroneously referred to as "the Daily Star reporter" in Sunday strip #1:
11/15/39,  though later in the same arc (#5: 12/13/39) the paper is
referred to as the Daily Planet. The switchover from George Taylor to
Perry  White as editor happened later in the year in Sunday strip and
comic book continuity, although the editor was still referred to as
Taylor in daily strip continuity until late in 1941.
E. Nelson Bridwell named the Earth in which the Superman whose career
started in the 40's and who had many of the Silver Age characteristics, 
'Earth 2A.' I have used 2A as a convenient location for stories which 
contradict Earth 2 continuity but which I think worthy of mention. I have 
allowed myself to fill in some details from John Byrne's Generations (such 
as Superman's otherwise-unnamed son), although I do not take the series as
canonical.  John Wells designates the Generations series as taking place
on Earth-3839.

 Rob Salkowitz and Kurt Mitchell advise me that 1958 is an approximate
switchover date for Wonder Woman.  Wonder Woman #98 was the first issue to 
depict Queen Hippolyta as a blonde.  Wonder Woman #105 retells the origin 
with a slightly different spin for the first time since the Golden Age.

 DC's decision that all of the heroes published by the Quality Comics
line actually began their careers on Earth 2 and then emigrated to Earth X
(in which they were notoriously ineffective in battling the Axis powers,
as the Nazis won in that parallel) created its own set of problems. I have 
placed information on the Quality characters in my Earth-X timeline, with
the exceptions of Plastic Man, the Blackhawks, and the Spider (Ludlow-Dalt).

 A Millennial note:  E. Nelson Bridwell has called the 1959 story in
Superman #128 "the last Earth-2 Superman story", because of its
inconsistencies with Earth-1 history (the previous year featured the
introduction of the contemporary Fortress of Solitude in Action
#241 and of Brainiac and Kandor in Action #242).  The story also
attributed properties to red kryptonite which were unseen anywhere else:
"Red Kryptonite that our scientists have discovered in the future!  This 
freak variety will not kill Superman, but will cause him to lose his super-
powers for TWO HOURS -- time enough for us to capture him!"  However, 
it's also clear that the space pirates from the year 2000 which appear 
in that story are completely divergent from any real-world developments, 
as well as developments in DC Comics titles as we have reached the year 
in question.  Consequently, A.D. 1999 was the last year in which I had 
"back-retconned" post-Crisis events into the pre-Crisis Earth-2; however,
after Grant Morrison's Seven Soldiers of Victory #0, I have revised that
policy.  It seems unlikely that the world would have returned so much to
a 'status quo' state after the evaporation of Earth's oceans, so privately
I believe the villains came from a later era; however I will retain A.D. 2000
on the timeline with a note.

 In Amazing World of DC Comics #16, circa 1977, Paul Levitz stated
the ages at which he was writing the various JSA members.  Some of them are
obviously inaccurate; most of the other birthdates I have listed here, although
all should be taken with a grain of salt.

 I have excluded most JLA/JSA crossovers as they have been dealt with 
extensively elsewhere.

For more detailed timelines for specific characters see:
Aaron Severson's The Golden Age Batman Chronology
The JSA Chronology

(thanks to John Censullo for many of the original historical entries, Kurt Mitchell
for his invaluable Earth-2 reviews, JSA expert Michael Kooiman, time travel expert 
Arthur Lortie, Wonder Woman expert Scott Nesmith, Mike Harwood for Three Sandmen 
info and general contentiousness, John Wells and the rest of the folks at the DC
Message Boards, and the folks at the Earth_2 e-mail list) 


pre-history
========================
 Ur the Caveboy and his sister Wur discover fire in a tree struck by lightning 
and use their new discovery to help them and their family against various vicious 
dinosaurs.  [New Fun #1]
 A scientist provides Alan Kane and Ted Dolliver with a time machine and 
they arrive in the prehistoric past from November, 1939.  [Carl H. Claudy]  [All-American #8]

98,056 B.C. 
========================
 The continent of Atlantis sinks, leaving only a few island remains of 
its once great cultures, including Aurania, Poseidonis, Therna Na Oge,
Tritonis, and Ventura.  [Wonder Woman #8, Comic Cavalcade #18]  
 Possibly, four rulers of Atlantis (Senor Prince, Mr. Monarch, The Masked 
One, and Mr. Crown) survive in suspended animation until April 1940, before 
being slain by an atomic blast.  [All-Star #52]
 Fragments of its technology survive into the 20th century, including jars
of paint of which anything painted with them comes to life at night, discovered
by artist Nels Darrow, [All-Star #28] and a radiant quality which gives 
those exposed to it super-powers exactly like Superman's, discovered by 
unscupulous seaman Bart Wellins.  [Action #230]

c. 50,000 B.C.
========================
 Cro-Magnon Vandar Adg is in battle against a deadly opponent when he is 
bathed in the radiation of a newly fallen meteor, unknowingly making him 
immortal. He adopts the name Vandal Savage.  His opponent takes a glowing
jewel from the heart of the exploded fireball, and gains the reincarnation 
powers of The Immortal Man.
 A caveman named Rog dons a mask made from the head of a saber-tooth tiger
to fight evil in the Stone Age as "probably the world's first lawman," 
Tiger Man.  [Batman #93]  
 Clark Kent, Lois Lane, Perry White, Professor Bates, and the mobster
Benny the Brute travel from February 1955.  Benny the Brute uses modern
gadgets to impress the local cave dwellers using the name Stoneman, before
he and the others return to their own time.  [Action #201]
 The time-lost 20th century hero named the Star-Spangled Kid hides for a
few weeks from a tribe of prehistoric men.  He is rescued by Aquaman,
Wildcat, and the Earth-1 Green Lantern.
 Wonder Woman, Steve Trevor, Professor Zool, the Holliday Girls, and Giganta
are all thrown into the past from 1944 by Professor Zool's "electronic 
evolutionizer".  They encounter Queen Darla and King Aros, and aid them 
against Giganta's treachery.   [Wonder Woman #9]

c. 40,000 B.C.
========================
 In ancient Atlantis, Vandal Savage founds a secret society that would later 
be known as the Illuminati. 

9638 B.C.
========================
 Green Lantern briefly visits the island nation of Atlantis from June 1950,
only minutes it sinks beneath the waves.  [All-Star #53]
 Some of their descendants survive into the 20th century with a thriving
glass-domed subsea kingdom, populated largely by handsome, muscular men
ruled by Queen Paralea.  [Superman #67]
 Some of their descendants survive into the 20th century in the cities of
Aurania and Venturia, ruled by Queen Clea, in which tall giantlike women 
hold positions of power while the men are shorter and hold domestic 
positions.  [Wonder Woman, Comic Cavalcade #18]
 At least a section of Atlantis survives as a surface island.  [Justice League #65]

c. 7000 B.C.
========================
 On Earth-2A, space travelers from Earth-S, Osira and Hefnakhti, are stranded
in prehistoric times.  They contribute to the rise of culture in Egypt until 
a rebellion fomented by a priest named Anankh results in their being captured 
and mummified alive.  In May 1942 Osira is awakened, and bedevils Wonder Woman
and the Justice Society before being defeated.  [Wonder Woman #231]

7049 B.C. 
========================
 Wonder Woman travels back in time from the year 1951 to the ancient
kingdom of Mu to stop the destructive bombing of Paradise Island in the
present. She battles Prince Ghu. [Wonder Woman #49]
 Shortly after this encounter, Mu sinks, only a thousand inhabitants of
the island surviving in suspended animation, reviving in 1947 to battle 
Hawkman.
 On Earth-2A, survivors colonise the planet Mars.  Their 20th century
representative is Marsboy  (Earth-2A counterpart of Starboy)   [Superboy #12] 

c. 4,000 B.C.  [???]
========================
 Bobby and his sister Binks are looking into the "Magic Crystal of History" 
when suddenly they find themselves in ancient Egypt. They encounter King Tut
and observe the Great Pyramid being built.  [New Fun #1] [Adolphe Barreaux]

c. 3,500 B.C.
========================
 The Lord of Order known as Nabu the Wise descends to Earth from the 
planet Cilia, landing in the region called Mesopotamia. 

c. 3,100 B.C.
========================
 [speculation]  Heru, avatar of the hawk-headed god Horus, uses Horus' 
gift of speed and becomes the first emperor of Egypt.  A scroll containing 
the formula he uttered to obtain this speed was found in the tomb of a 
king named Amen [Aha Menes], and deciphered in 1941 by Professor Gill, 
who gifted the secret to Johnny Chambers (who, unknowingly, was influenced 
to adopt a hawk emblem on his uniform as Johnny Quick).

c. 3,000 B.C.  
========================
 A race of bird-people inspire the Egyptians to create their mythology. 
Thoth, their leader, "warned the Egyptians of the world-curse of his 
eternal enemy, Setekh ... but they heeded him not. So, he left the 'Black 
Land' forever, leading his great flock to what is now called Greenland. 
There, they founded Feithera. Then he left this planet altogether, and 
has since been seen by none.  [Infinity, Inc. # 43]
 The Spectre destroys the cities of Sodom and Gomorra. [Spectre #3/Genesis 19:24-25]

c. 2700 B.C.   
========================
 Vandal Savage is a king in ancient Sumer.  [Flash #137]

26th century B.C.??    
========================
 In Egypt, the time-lost 20th century hero named Stripesy is forced into
slavery for a few weeks before he is rescued by Hourman, Starman, and the 
Earth-1 Batman.

c. 2580 B.C.   
========================
 Vandal Savage and Kulak both pose as Cheops (Khufu), ruler of Egypt.
Defeated by Savage, Kulak is placed in a tomb-like time capsule in the 
Egyptian desert.  [JSA V2#10]  Vandal Savage purportedly rules Egypt from 
2590 to 2567 B.C., ordering the construction of the Great Pyramid at Giza.  
He apparently continues his rule by masquerading as his own son, Khafre.  [Flash #137]
 Superman assists Cheops by completing construction of the Great Pyramid
(which provides evidence that there was a real Cheops, as the Superman
of February 1948 would probably recognise Vandal Savage).  [World's Finest #32]

2030 B.C.
========================
 In the Egyptian city of Bubastis, the mad priest Khalis slays his followers 
in the name of the god Anubis, who grants Khalis the Amulet of Anubis as a reward 
for his service. Nabu the Wise overcomes Khalis, strips him of the Amulet, and 
orders Khalis mummified alive.  [First Issue Special #9]

c. 1500 B.C.
=============================
 Superman and Mike Mooney are projected from July 1948 by Professor Grog.  
Superman completes construction of the Trojan Horse for Agamemnon.  [Superman #53]
 Green Arrow travels back in time to meet Diana the Huntress  [Adventure #111]

1567 B.C.       
========================
 In Egypt, Prince Khufu-Maat-Kha-Tar and his beloved Chay-Ara are
assassinated by Hath-Set, an evil priest of Anubis who truly serves 
Setekh.   3,500 years later, they will be reincarnated as Carter Hall 
and Shiera Sanders.  [Flash #1]

c. 1290 B.C.
========================
 Nabu becomes adviser and court magician to the pharaoh Ramses. He 
is humbled in battle with the Spectre, who kills Ramses for his crimes 
against the Hebrews. Despite Nabu's warnings, the pharaoh's son,
Ramses II, continues the persecution of the Hebrews. In retaliation, 
the Spectre slays the first-born sons of Egypt and then protects the Hebrews 
by parting the Red Sea as they flee the pharaoh's troops. Some time after 
these events, Nabu the Wise, realizing that his mortal form is weakening, 
places himself in suspended animation in a tomb in the land of Sumer, in the 
Valley of Ur, to await a new mortal host.  [Spectre #14, Exodus 12:29-14:21-31]

c. 1200 B.C.
========================
 The time-lost 20th century hero Speedy is transformed by Circe into a
centaur for a few weeks before he is cured and rescued by the Red Tornado II, 
the Earth-1 Flash, and Zatanna.
 The Greek goddess Aphrodite creates a new, all-female race of Amazons 
(approximately 2,500 in number, led by queen Hippolyta. After Hippolyta is 
humiliated by Hercules, the goddess transports the Amazons to the island of 
Themyscira (also known as Paradise Island), where they have no further contact 
with "Man's World" for more than 3,000 years.  While on Themyscira, the Amazons 
do not age and are effectively immortal.  [All-Star #8]
 A small group of Amazons settle on "Amazon Island", situated thousands of miles
from Metropolis, whose Queen Elsha attempts to trap Superman into marriage in
December 1957 (by which time, of course, he was already married).  [Action #235]

c. 1190 B.C.
========================
 The Amazons take it upon themselves to rescue abandoned Spartan
female babies, transporting them to the distant planet Infanta.  Abandoned
male babies are taken to the planet Duxo by agents of Mars. [Wonder Woman #37]
 The Amazons banish the sorceress Circe to the planet Sorca. [Wonder Woman #37]
 Wonder Woman, Steve Trevor, Professor Zool, the Holliday Girls, and Giganta 
travel to Amazonia from 1944 (a detour on their way back from c. 50,000 B.C.) 
and help the Amazons defeat a Greek invasion force led by Odysseus and Achilles 
(who evidently survived the Trojan War on Earth-2).  [Wonder Woman #9]

c. 1050 B.C.
========================
 People of ancient Babylon revere a hero named Zorn [Batman #102]
 The technologically sophisticated Krell (or Krull), a race that rules great 
sections of the galaxy, disappears overnight except for a handful of isolated 
stragglers.  A descendent of the latters visits Earth on August, 1942 where he
encounters Wonder Woman.  [Mystery in Space #73, World's Finest #249]

331 B.C.
========================
 Per Degaton travels back in time from 1947 to help the Persian king Darius defeat 
Alexander the Great in the Battle of Arbela, changing history. The JSA later travels 
back in time to thwart Degaton, restoring history to its original course. [All-Star #35]

c. 350 B.C.
========================
 Alexander the Great is brought to 1942 by Dr. Doome and battles the Seven 
Soldiers of Victory.  [Leading #3]

c. 225 B.C.
========================
 The Crimson Avenger and Wing land in China, captured by the Dummy and sent into the 
past with a stolen time machine, and help defend against a Japanese invasion before 
being rescued by the Shining Knight.   [Leading #8]

c. 1st century B.C.   
========================
 Vandal Savage rules Rome, adopting the identity of Gaius Julius Caesar.  He fakes
his own death in 44 B.C.  
 The Vigilante, captured by the Dummy and sent into the past with a stolen time machine, 
meets Caesar in the period before being rescued by the Shining Knight. [Leading #8]
 In 50 B.C., Wonder Woman, Steve Trevor, Etta Candy and the Holliday Girls are
transported to Rome from the year 1946 by a "time monster." Wonder Woman
meets Julius Caesar and helps him defeat a band of renegades attacking Rome.  [Wonder Woman #20]
 The Roman centurion Longinus uses his spear to pierce the side of Christ as he 
hangs on the cross. In future years it becomes known as the Spear of Destiny. [Weird War Tales #50/John 19:34. 
 The Roman emperor Nero is brought to 1942 by Dr. Doome and battles the Seven 
Soldiers of Victory.  [Leading #3]
 The Star-Spangled Kid and Stripesy, captured by the Dummy and sent into the past 
with a stolen time machine, are on hand when Leif Ericcson and Eric the Red discover 
North America before being rescued by the Shining Knight. [Leading #8]
 The Starheart falls in China as a green, glowing meteorite. It is found by a
blacksmith named Chang, who fashions it into a lantern. When Chang is apparently 
killed by neighbors, the lantern slays his attackers with a burst of energy.
Chang survives the assault, and retains a small chip of the meteor, which he 
calls the "Power Stone," and uses its energies to keep himself alive down through 
the centuries, leading the Tong of the Green Dragon as Lord Chang.  [Green Lantern #109]

84 B.C.
========================
 The Winds of Time send Etta Candy and the Holliday Girls to Rome from
the year 1946. Wonder Woman and Steve Trevor follow, and Wonder Woman battle
General Lucius Cornelius Sulla. [Wonder Woman #17]

71 B.C.
========================
 Atom & Hawkman briefly visit ancient Rome during the time of Spartacus'
rebellion.  [All-Star #53]

51 B.C. 
========================
 Wonder Woman travels to China from 1949 to investigate a Chinese
mummy found carrying an Amazon shield. While there, she stops a Tartar
invasion of China and builds the Great Wall of China for protection. [Wonder Woman #37]

A.D. 60
========================
 Wonder Woman travels to Britain from 1946 to help Queen Boadicea
battle Roman soldiers. [Sensation #60]

c. 100 
========================
 A gladiator named Abrihim Barabbas is transformed into an angelic 
winged warrior known as Gabriel. He perishes in battle with a demonic 
lion-man.  [Hawkman V3#25]

c. 450
========================
  Dr. Mid-Nite & Wonder Woman briefly encounter Attila the Hun, from 
June 1950. [All-Star #53]
 Attila the Hun is brought to 1942 by Dr. Doome and battles the Seven 
Soldiers of Victory.  [Leading #3]

mid 6th century     
========================
 The era of King Arthur and Camelot.
 Brian Kent, aided by a falcon called Slasher, becomes The Silent Knight.  [Brave & Bold #1]
 The Shining Knight enters suspended animation and awakens in the 20th
century.  He eventually (with the help of Merlin's magic) begins to make
periodic jaunts home from 1947 on, and takes a young man named Butch as
his squire.
 Wonder Woman travels to Camelot from 1952 and helps King Arthur defeat the 
evil Merlin (Vandal Savage?) and rescue Queen Guinevere [Wonder Woman #54]
 The JSA travel to Camelot from February 1977 and battle (the 20th century) Vandal 
Savage, who masquerades briefly as King Arthur.  [All-Star #65]
 Batman visits from 1946 and is knighted by Arthur after clearing Merlin
of a charge of treason and revealing Mordred as a spy for Morgan Le Fey.  
[preferred post-Crisis substitution:  Hourman]  [Batman #36]
 Wildcat visits after being given an elixer by a mysterious dwarf. 
  
8th century
========================
 Arak and Valda have adventures  [Arak #1]

9th century
========================
 The sailor known as Sinbad has many adventures across the seven seas.  [Arak]

c. 10th century     
========================
 The Crier, a villain of ancient Baghdad who always weeps as he steals, 
plunders the city  [Batman #49]
 In the Central American civilisation of Quetzatlan, Emperor Quexo, 
Empress Nara and the wise man Haxtl place themselves into suspended
animation in a "magic sun globe" to escape the decline of the empire.
They awaken in December 1946 and attempt to re-establish their rule
before encountering Superman.  [Action #103]
 Superman, Batman & Robin travel from November 1955 to Baghdad to help
Aladdin overcome Abdullah and his gang of Forty Thieves.  [World's Finest #79]

11th century  
========================  
 In Persia, Vandal Savage's secret organization, formed in ancient
Atlantis, takes the name "the Illuminati".
 About the year 1070, the followers of Hassan Ibn Sadah, founder of a sect
of assassins, slay many high-ranking men in Persia.  The line continues 
until the year 1940 when Ibn Sadah's descendent is executed by Hawkman.  [Flash #5]
 In 1086, Wonder Woman travels from 1955 to the kingdom of Prince Alain to
restore him to the throne and defeat the Black Baron [Wonder Woman #72]

12th century   
========================
  In England, Robert Fitzooth, Earl of Huntingdon, becomes Robin Hood upon 
returning from the crusades, King Richard having sent him back to England 
to investigate the trouble there.  He and his men hide in Sherwood Forest, 
stealing from the corrupt rich and giving their spoils to the downtrodden 
poor.  [Robin Hood Tales #1].  He is visited by the golden age Flash briefly 
as well as Batman & Robin from 1946 briefly [preferred post-Crisis substitution:  
Hourman & Second Sweep]  [Detective #116].  The time-lost 20th century archer 
named Green Arrow poses as Robin Hood for a few weeks before he is rescued by 
Hawkman, Dr. Mid-Nite, and Wonder Woman. 
 Wilfred of Ivanhoe becomes the Disinherited Knight.  [New Fun #1]  [Sir Walter Scott & Charles Flanders]
 Superman visits the English town of Belford from September 1954 and helps 
the local townspeople overthrow the evil Duke Glennon.  [Superman #92]

13th century        
=======================
  The Mongol warrior named Temujin becomes Genghis Khan, becoming the
prince of the Mongols and leading their invasion of China.  He twice, 
in the early 1160's and in the year 1237, encounters a time-traveling 
Flash, who saves his life and is rewarded with his sword.  [intended for
All-Star #58, unpublished; synopsis appears in The All-Star Companion].  
The time-lost 20th century hero named the Shining Knight loses his memory 
and serves under Genghis Khan for a few weeks before he is rescued by the 
Sandman, the Earth-1 Superman, and Metamorpho.  Genghis Khan is also 
brought from this era to 1942 by Dr. Doome and battles the Seven Soldiers 
of Victory.  [Leading #3]   Vandal Savage impersonates Khan for a period, 
later claiming to be the man himself. [Flash #137]
 Allan De Beaufort, the "Iron Man," fights in the Fourth Crusade (1202-1204) 
and becomes a Knight Templar before returning to Europe and fighting evil there.  [New Comics #1]
 Roger Bacon sends two students, 20-ish blonde Marcus and younger, dark-haired 
Guy Tiller, from 1255 to June, 1955 to discover whether the future will be 
worth working for.  Having discerned from historical records (of their frequent 
trips courtesy of Professor Nichols) that Batman and Robin are futuristic time 
travelers, he dresses Marcus and Guy in identical uniforms on the assumption 
that "future men must ALL dress like the two in the drawings."  The pair, armed 
with crossbows, quivers of arrows and small shields, inadvertently impersonate 
and then assist the Dynamic Duo before returning to their own time.  [preferred 
post-Crisis substitution:  Hourman & Second Sweep]  [Detective #220]
 At a later date, Roger Bacon is brought to December 1951 by a scientist who
seeks the secret of turning other elements into gold.  [Mystery In Space #5]
 Wonder Woman travels from 1948 to the kingdom of Barania in the year 1270 to 
stop Count Gaston from killing the country's rightful ruler, King Philippe.  [Wonder Woman #27]

1372
=======================
 The Flash & Black Canary briefly visit Samarkand and encounter Tamurlane,
from June 1950.  [All-Star #53]

c. 15th century     
=======================
 A scholar named Galio finds the Four Wonders of Alchemy:  the 
Philosopher's Stone, the Elixer of Youth, the Universal Solvent,
and the secret of Perpetual Motion.  [All-Star #42]
 In Mexico, the time-lost 20th century hero named the Crimson Avenger
loses his memory and, for a few weeks, is convinced he is the Aztec war
god Huitzilopochtli.  He is cured and rescued by Dr. Fate, the Earth-1
Atom, and the Elongated Man. 
 The Shining Knight, captured by the Dummy and sent into the past with 
a stolen time machine, meets Leonardo da Vinci.  Leonardo builds a time 
machine that Sir Justin uses to rescue the other timelost 7SoV.  [Leading #8]
 In the late 1400's, using the time machine of his own design, Leonardo da Vinci
brings Wonder Woman to Florence from 1953 to end the rule of the evil Duke
Perilosa. [Wonder Woman #57] 
 Leonardo da Vinci's family line continues to the present day; his descendents
include Luigi and later Giovanni (Jonathan) Zatara.
 In 1451, Wonder Woman travels to Mainz, Germany from 1954, where she saves
Johannes Gutenberg's printing press from being destroyed by criminals.  [Wonder Woman #69]
 In 1492, Wonder Woman travels back in time from 1954 and prevents
Christopher Columbus' ships from being destroyed by a prehistoric water
dinosaur. [Wonder Woman #69]

1554
=======================
 Wonder Woman travels from the year 1954 to the kingdom of Sardonia,
where she impersonates Queen Niana.  [Wonder Woman #63]

1555
=======================
 Wonder Woman travels to Tegurana Island from 1955 to rescue John
Keigh from natives. [Wonder Woman #72]
 Hawkman visits the astrologer Nostredamus, seeking his crystal ball.
[intended for All-Star #58, unpublished; synopsis appears in The All-Star Companion].

1558  
=======================  
Jon Valor becomes the Black Pirate. [Gardner Fox & Sheldon Moldoff]  [Sensation #1]  
The Lord of Time briefly transports him to 1978 to battle the JLA and the JSA.  [JLA #159]
Jon Valor is later killed, and is forced to wander the seas as a ghost.  [Starman #31]
 As Vandalo Savaje, Vandal Savage leads the Spanish Armada in a failed 
campaign against Sir Francis Drake.

1588
=======================
 Superman travels from May 1954 and assists Elizabeth I in defeating the
Spanish Armada under the guise of Captain Kent the Terrible.  [Superman #89]

1606
=======================
 Superman and Lois Lane visit England from January 1947, as a result of being 
exposed to Professor Rinton's time ray.  They rescue William Shakespeare from
a gang of criminals and assist him in the staging of Macbeth.  As Clark Kent, he
and Lois Lane establish the world's first daily newspaper, Ye Daily Planet.  [Superman #44]

1626-27
=======================
 The events of Alexandre Dumas' The Three Musketeers.  Green Arrow and Speedy, 
captured by the Dummy and sent into the past with a stolen time machine, meet 
the Three Musketeers before being rescued by the Shining Knight.   [Leading #8]
 Superman, Batman and Robin travel from May 1956 and assist the Three Musketeers
against the king's evil chancellor Bourdet.  [World's Finest #82]
 Henri Duval has adventures as a French soldier of fortune.  [New Fun #6]
 
1632
=======================
 An alleged sorcerer known as the Purple Pilgrim is sentenced to death by Judge 
Sanders. The Pilgrim responds by cursing him "and all who may come after you and 
bear your hated name." Viewing the man's punishment as unjust, a faction of the 
community decides "to cut themselves off from the colonies" and move to a completely 
isolated area known as Hidden Valley.  [Flash #86]

1651
=======================
 The pirate Capt. Storm buries a fortune in jewels on land that will
become the site of the Holliday College for Women in Washington, D.C. [Wonder Woman #48] 

1668
=======================
 A cult of worships Nawor, ruler of the extradimensional realm of Geimpo, is 
led by a sorcerer named Zebabeb Dodson.  Forced to flee England in 1668 for
their beliefs, Dodson and his followers settle in America on the site of 
present-day Gateway City, then called Road Point.  They are put under a curse 
of death by a Native American shaman for stealing mystical artifacts from his 
tribe, but Nawor intercedes so the cult is thrown into limbo.  In September 
1968 they escape to attempt to summon Nawor, but are prevented by the Spectre.  [The Spectre #6]

1692
=======================
 Wonder Woman travels to Puritan America from 1948 to rescue one of the 
Holliday Girls who has arrived in the era and been convicted of witchcraft. [Sensation #73]

1700        
=======================
 Keith Everet, the Earl of Strethmere, is killed by a band of itinerant rogues.  [Sensation #1]

18th century  
=======================     
 Abel Adams becomes Captain Lightfoot, and confiscates shipments of
contraband guns to help avert warfare between the colonists and Indians.  [Batman #79]
 Thomas Hawk has adventures as Tomahawk, and founds the Rangers.  [Star-Spangled Comics #69] 
 Elizabeth Lynn becomes Miss Liberty (ancestor of Libby Lawrence/Liberty Belle).  [Tomahawk #81]
The Lord of Time briefly transports her to 1978 to battle the JLA and the JSA.  [JLA #159]
She dies shortly before the end of the Revolutionary War, fighting Hessian troops
who had stolen the Liberty Bell.  Her body was found by Tomahawk.
 The brutish pirate known as Captain Skull, loots the Caribbean islands and the
Carolinas.  He is later reincarnated as American special ambassador Joseph Clanton
and in November 1967 manages to reassert enough of his own personality to pester
the Spectre.  [The Spectre #1]
 Narkran, apprentice to an elderly alchemist, enacts a spell to open "the doorway 
to limitless power."  He finds himself flung to another dimension, and returns to
Earth in January 1969, only to be foiled by The Spectre.  [The Spectre #8]

1750
=======================
 A time monster sweeps Wonder Woman, Steve Trevor, Etta Candy and
the Holiday Girls to Charleston, South Carolina from 1946. Wonder Woman
defeats a band of pirates while there. [Wonder Woman #20]
 A member of the Drake family begins service "in the original London
police -- the Bow Street Runners, under John Fielding," initiating a
nearly two-hundred year family tradition in law enforcement.  [DC Special Series #10]

1753  
=======================     
 American colonist Jeremy Coe is the first known man to use the batcave as
his headquarters as he attempts to avert warfare between colonists and
Indians while disguising himself.  [Detective #205]

1760
=======================
 Dr. Indigo Maylor, a botanist who basically creates Triffids, is saved from 
his hanging on July 1st by Carr Davis and his fiancee Anne Bell who create a 
machine that snatches folks from the past, and is brought to August 1951.  
Carr and Bell grab Ben Franklin and Napoleon to help defeat the plant 
creatures.  [Mystery In Space #3]

1775
=======================
 Wonder Woman travels to Boston from 1954 to prevent British agents
from stopping Paul Revere's ride [Wonder Woman #69]. She also travels 
to the American West from 1951 to discover why a totem pole carved in this 
year bears her likeness. [Wonder Woman #47].

1776  
======================= 
 On July 4th, after signing the Declaration of Independence, Ben Franklin,
John Adams, and Thomas Jefferson join with 10 others to perform a mystical
ceremony.  Led by the alchemist Taylor Hawke, they create the living
spirit of the United States.  Later that year, Taylor Hawke is killed; the
living spirit of America bonds with his soul to form the Minuteman.  The
Minuteman is with Washington at Christmas when he crosses the Delaware.  [Spectre #38]
Also assisting the crossing by breaking up ice on the river is Superman, 
traveling from September 1947.  [Superman #48]

1777
=======================
 Suspecting that a friend's hatred of men stems from a past life,
Wonder Woman travels to Scotland from 1947 to learn the cause.  [Comic Cavalcade #24]

1779
=======================
 Ely Kent, a Colonial-era blacksmith and ancestor of John Kent, receives a
promissory note for $2,000 from George Washington.  Superman travels from 
May 1949 and encounters George Washington a second time after the butler
of Clark Kent's cousin Titus Kent, and heir to his estate, discovers the 
note and attempts to murder all living Kents to acquire sole ownership of
the accumulated interest.  [Action #132]

c. 1781   
=======================
 The Minuteman fades away after Yorktown.

1790
=======================
 The events of Mary Shelly's novel Frankenstein.

1796  
=======================
 As Marshal Sauvage, Vandal Savage becomes an advisor to Napoleon; during
this period, Napoleon is brought to 1942 by Dr. Doome and battles the
Seven Soldiers of Victory.  [Flash #137/Leading #3]

early 19th century  
=======================
 Buckskin Jim and his grizzled best friend Trapper Pete have adventures
on the American frontier. [New Fun #1]
 Captain Bill leads the Texas Rangers. [New Fun #2] 
 Chuck Dawson has adventures.  [Action #1]
 Hannibal Hawkes becomes the Nighthawk.
 The Masked Ranger has first public case  [Jim Chambers]  [More Fun #36]
 The man known as Rodeo Rick briefly becomes the Masked Stranger.  [Western #58]
 William Polk has adventures as the Wyoming Kid.  [Western #1]

1812
=======================
 Using the magic sphere, Queen Hippolyte of the Amazons learns that
she will one day have a daughter who will be known as Wonder Woman in the
world of men. Seeing that women in the South American city of Cochabamba are
about to be destroyed by conquistadores, Hippolyte summons Wonder Woman to
help them. [Sensation #70]

1827  
=======================  
 The events of Edgar Allan Poe's The Narrative Of Arthur Gordon Pym Of 
Nantucket; Arthur Gordon Pym finds the Dzyan.

1835
=======================
 Mr. Oliver Weed builds a time sphere and travels from December 1935.  [Sheldon Mayer]  [New Comics #1] 

1842  
=======================
 Captain Rip Carter, the "White Dragon", liberates China.

1840's       
=======================
 Don Fernando Suarez becomes the original El Castigo, the Whip. 
 After Etta Candy has been swept back in time from 1946 to the
Old West, Wonder Woman and Steve Trevor follow and rescue her. [Wonder Woman #17]

1846
=======================
 [speculated] Zachary Zor, a member of a mysterious organization the
Eight Unknown Men, defects to the side of unrighteousness.  It is possible
his defection is tied to the child murderer Cyrus Gold.  The remaining
Seven Unknown Men later enlist Richard Occult and Rose Psychic into their 
ranks, and possibly have some influence on the formnation of the Seven 
Soldiers of Victory.  Zor goes on to confront the Spectre.  [Seven Soldiers of Victory #1]

1849
=======================
 Wonder Woman travels from 1949 to the western town of Twin Peaks to
learn how her name was written in a diary from that year. Once there, she
battles Jabez Dexter.  [Sensation #87]

c. 1861  
=======================  
 The African-American Samuel Braxton becomes the Black Bat, a mounted 
figure with batwings, horned cowl and batarang, to fight on the side of
the U.S. Army.  [Batman #600]  [Ed Brubaker & James Walker]

c. 1866        
=======================
 Arthur Gordon Pym becomes Captain Nemo.
 Vengeful ex-slaves resolve to have revenge against New Orleans plantation 
owner Louis DuBois.  A hypnotized DuBois is commanded to go to a voodoo 
ceremony even as his sister, Dala, surreptiously trails him. DuBois, 
mesmerized, is commanded to thrust his hand into a basket -- where a snake 
bites him. Dala races after her yelling brother, imagining that the snake 
had been poisonous. In fact, the bite had been the last part of a ceremony 
designed to make Louis into a vampire -- and Dala DuBois becames the first 
he infects to join him among the undead.  By 1938 Louis DuBois is masquerading
as a werewolf and calling himself The Monk.  [Detective #517]

late 1870   
=======================
 Vandal Savage becomes an advisor to Prince Otto Von Bismarck, the premier 
and later chancellor of Prussia. Savage orchestrates Bismarck's victory over
the French in the Franco-Prussian war (1870-1871) and consolidation of the 
German states.  [Flash #137]

1870'S
=======================
 The time-lost 20th century gunslinger named the Vigilante becomes sheriff of
Pepper Gulch, Arizona for several years.  On February 12th, 1875 he and Johnny
Frankenstein corral the giant 'bufallo spider' in Miracle Mesa.  He is defending 
himself against an onslaught from a tribe of American Indians when he is rescued 
by Black Canary, Johnny Thunder, and the Earth-1 Green Arrow. 

1878
=======================
 Superman, traveling from May 1949, encounters P.T. Barnum, who offers
him the job of a circus strongman.  He also encounters the youngester
who will one day grow up to be his own foster father.  [Action #132]

1894  
======================= 
 Cyrus Gold is murdered in Slaughter Swamp near Gotham City. His corpse later 
is reanimated as Solomon Grundy.  [Alfred Bester]  [All-American #61]

1899  
=======================
  On December 31st, Zator, a member of a group of mystics called the Seven
rescue two infants from sacrifice to the demon Koth later named Richard
Occult and Rose Psychic.

1900
=======================
 Jules Verne travels from here to March 1956 to assist Batman & Robin in
constructing a weapon capable of defeating the villainous Simak  [preferred 
post-Crisis substitution:  Hourman & Second Sweep]  [Batman #98]

1903
=======================
 Professor Challenger's and Lord John Roxton's expedition to The Lost World, as 
related by Edward Malone (edited by Arthur Conan Doyle).
 Wonder Woman travels to Kitty Hawk, North Carolina from 1954, where
she smashes a meteor that is about to destroy the Wright Brothers plane.  [Wonder Woman #69]

1912        
=======================
 Perkins (Arthur Gordon Pym) builds Leviathan which is used to sink the
Titanic. 

1913
=======================
 Sir Denis Nayland Smith and Dr. Petrie first cross paths with Dr. Fu Manchu.  [Detective Comics #18].

1915  
=======================
 Bruce Wayne is born April 7, in Gotham City to Thomas and Martha Wayne. 
[America Vs. the JSA #1; birthdate is closer to 1917 according to AWoDCC #16]
 James Brendan Corrigan is born.  [AWoDCC #16]

1917
============================
 Johnny Thunder born July 7, at 7 am.  [Flash #1]
 Charles McNider born.  [AWoDCC #16]
 James Wright and Samuel Dashiell Hammett, two Pinkerton detectives, travel to 
the city of St. Roch on a case.  James Wright is reunited with an old lover of 
his, Sheila Carr, and briefly makes use of an Nth metal ring before the pair are
killed by mobster Big Louie Moretti.  [Hawkman #27]
 The U.S. 13th Air Squadron loses one of its members, Captain Luther Jarvis, to
a German ace named Kreig.  In June 1967, Jarvis' ghost returns as The Ghost Pilot
to avenge himself on his comrades for abandoning him, although he is foiled by
the Spectre and the Earth-1 Flash.  [The Brave & the Bold #72]

1920
========================
 Noted archeologist Sven Nelson and his 12-year-old son Kent conduct a dig 
in the Valley of Ur in Mesopotamia. Upon opening the sarcophagus of Nabu the 
Wise, Kent releases poison gas which immediately slays his father. Nabu takes
pity on the boy and schools him in the ways of mysticism.  [All-Star Squadron #47]
 A rocket lands on Earth from the exploded planet Krypton, Kal-L is a few 
months old.
 Alan Wellington Scott born.  [AWoDCC #16]

1922
=======================
 Jason Peter Garrick born.  [AWoDCC #16]
 Carter Hall born.  [AWoDCC #16]

1924
======================= 
June 8
 Thomas & Martha Wayne are killed; several years later Bruce Wayne has 
first public case as Robin I assisting police detective Harvey Harris.
[Detective #226, date from the  1976 Super DC Calendar]
 Alan Pratt born.  [AWoDCC #16]

1926
========================
 Sylvester Pemberton is born.  [All-Star #70]

1928
========================
 Richard Grayson is born November 11, to John and Mary Grayson.  [Last Days of the JSA]
 Dinah Drake is born April 10, to Mr. and Mrs. Richard A. Drake.  [1976 Super DC Calendar]

circa 1933
========================
 Wesley Dodds, Clyde Dunlap and Happy O'Shea serve together as Navy pilots,
and gain notoriety as the Three Musketeers. At some point between the end
of their service and 1939, Dunlap and O'Shea assist Dodds as the Three
Sandmen (wearing gasmasks and specialising in sleeping gas-based attacks, 
devised by Dodds).  [Adventure #42]  [Bert Christman]
 Terry Sloane wins three Olympic medals during the 1930s (at the 1932 or 1936 
Olympics or both)   [National Comics V2#1]

1935
========================
October
 Dr. Occult & Rose Psychic have first public case as paranormal detective
agency. [Jerry Siegel & Joe Schuster]  [New Fun #6]
 Don Drake (descendent of the Drake law-enforcement family?) and Betty
have adventures on the planet Saro, where they encounter Midget Men from Mars 
and a race of giant ants. [New Fun #1]  [Kenneth Fitch & Clemens Gretter] 

1936
========================
 The archeologist Indiana Jones uncovers the Arc of the Covenant.  [Raiders of the Lost Arc]
 The jade lantern constructed by the blacksmith Chang is found by Terry Lee 
and Pat Ryan as they track the pirates of the China seas, and is brought to
America, where eventually it is left outside Arkham Asylum, just north of
Gotham City.  [Secret Origins #18]

1937
========================
 Slam Bradley has first public case as adventurer. [Jerry Siegel & Joe Schuster]  [Detective Comics #1]
 Cosmo, Phantom of Disguise, has first public case.  [Sven Elven]  [Detective Comics #1]
 Cyril "Speed" Saunders has first public case special operative in a unit of 
the river patrol.  [Detective Comics #1]
 Bat-Man may have had first public case.  [Detective Comics #65]  [Note from 
Aaron Severson: This story explicitly states that Mike Nolan was murdered in 1937 and 
that Batman was already in action at that time. However, the majority of subsequent
accounts explicitly indicate that BatmanÕs career began in 1939, the time of his 
textual debut, so this account can be considered apocryphal.]  [Note from Mikel 
Midnight: I am also personally loath to have Batman begin his career in advance 
of Superman, although any canonical indication that Superman may have begun his 
career in 1937 orearlier would incline me to include this story dating in the 
timeline]

1938
========================
May
 Nadir, Master of Magic, has first public case.  [New Adventure #17]
June
 Clark Kent/Kal-L, reporter for The Metropolis Daily Star under the editorship 
of George Taylor, becomes Superman after the deaths of his parents John and Mary 
Kent.  [Jerry Siegel & Joe Schuster]
 On Earth-2A, Clark Kent/Kal-El, reporter for The Cleveland Evening News under 
the editorship of George Taylor, becomes Superman following his career as Superboy, 
after the deaths of his parents Jonathan and Martha Kent.  He and Lois Lane are
eventually transferred to the Metropolis Daily Planet under the editorship of 
Perry White, after briefly working on a New York beat.
 On an alternate Earth, Clark Kent/Kal-El, reporter for The Metropolis Daily 
Planet under the editorship of Perry White, becomes Superman after the deaths 
of his parents Eben and Sarah Kent.  [George Lowther]
 On an alternate Earth, Kal-El arrives from a Krypton which orbits the sun 
opposite the Earth, having grown to adulthood during his journey, and adopts 
the name Clark Kent (on the advice of a professor and his son whom he has saved
from a runaway train) as a pseudonym with which to become a reporter for The 
Metropolis Daily Flash, under the editorship of Paris White.  (Kryptonite on
this Earth just makes Superman incapable of moving.  In order to kill him, he 
has to be exposed to it long enought to starve to death.)  [Mutual Radio]
 Harry "Tex" Thomson has first public case as a cowboy/adventurer  [Bernard Bailey]  [Action #1]
 Giovanni Zatara has first public case [Fred Guardineer]  [Action #1]
October
 On Halloween night, Lee Travis & chauffer become the Crimson Avenger & Wing  [Jim Chambers] [Detective #20]

1939
========================
 While on an archaeological expedition in Egypt, Professor James Rock 
unearths the crystal dagger that Hath-Set used to murder Prince Khufu 
and Chay-Ara.  [Flash #1, Secret Origins #11]
February
  Cotton Carver begins his adventures as world-famous explorer and
adventurer.  [Adventure 2/39]  [Gardner Fox & Ogden Whitney]
April
 Hop Harrigan has first public case as a pilot/adventurer  [John L. Blummer] 
May
 Bruce Wayne has first public case as The Bat-Man [Bob Kane & Bill Finger]
June
  Wesley Dodds has first public case as Sandman in New York City [Gardner Fox & 
Bernard Bailey]  [New York World's Fair Comics #1]; later, Sandman and Crimson 
Avenger save England's Royal Family from the Phantom of the Fair, after which the
Crimson assists Sandman in perfecting his sleeping gas technology. [Secret Origins]
 death of Nadir, Master of Magic?  (strangled into unconsciousness and abducted in 
the cliffhanger of his last appearance)  [New Adventure #30]
July 23
 Detective Jim Corrigan, of the 101st Precinct in Cliffland City, is murdered; 
within a month he becomes the Spectre. (date from 1976 Super DC Calendar). [Jerry Siegel & Bernard Bailey] [More Fun #52-53]
November
 Purported origin of Steel the Indestructable Man; internal evidence suggests 1941.
December
 Rex Tyler has first public case as Man of the Hour in Cosmos City; by March 1965 he
is living in Gotham City.

1940
========================
January
 Jay Garrick becomes the Flash in Keystone City [Gardner Fox & Harry Lampert]  [Flash #1]
 Carter Hall of 1948 Keystone Avenue becomes Hawkman in New York City (also 
identified as Gotham City).  [Gardner Fox & Dennis Neville]  [Flash #1]
 Johnny Thunder first uses the Thunderbolt in New York City (later Park City).  [John Wentworth & Stanley Aschmeir]  [Flash #1]
 Rodney Elwood Gaynor becomes the Whip  [John Wentworth & George Storm]  [Flash #1]
February
 Rex Darrell becomes Flying Fox.  [Terry Gilkinson]
 Sandman encounters the cat burglar, "The Lady in Evening Clothes," who is later
revealed to be Dian Belmont, daughter of the District Attorney.  [Adventure #47]
March
 Rex Tyler becomes Hourman  (cf. Man of the Hour)  [Bernard Bailey]
 King Standish becomes the King  [Gardner Fox & Harry Lampert]  [Flash #3]
April
 Richard Grayson becomes Robin II  [Jerry Robinson]
 Selina Kyle has first public case as Catwoman
May
 Kent Nelson becomes Dr. Fate  [Gardner Fox & Howard Sherman]  [More Fun #55]
 Tomas Ludlow-Dalt becomes the Spider (Alias the ...)  [Paul Gustavson]  [Crack #1]
June 20th - 22nd
 The man known as the Unknown Soldier has first case.  [Unknown Soldier #249]
July
 Alan Scott becomes Green Lantern, eventually settling in Capitol City (later Gotham City).  [Bill Finger, Martin Nodell and Sheldon Mayer]
August
 Janice "Peggy" Maloney accompanies Tex Thomson and Bob Daley as Miss X [Action #26]
October
 Al Pratt becomes the Atom in Calvin City. [Bill O'Conner & Ben Flinton]
 Abigail Mathilda Hunkle becomes the Red Tornado I  [Sheldon Mayer]
 James Anthony has first public case.  [Robert Leslie Bellem & W.T. Ballard]  [Super-Detective #1]
November 22
 First meeting of the Justice Society (Atom, Dr. Fate, Flash, Green 
Lantern, Hourman, Sandman, Spectre); Johnny Thunder and The Red Tornado
sneak into the meeting; Superman and Batman abstain. [Gardner Fox]  [All Star #3]
December 1
 Charles McNider becomes Dr. Mid-nite in New York City (also identified as
Gotham City; date from 1976 Super DC Calendar, locale from All-American #74).  [Charles Reizenstein & Stanley Aschmeir]

1941
========================
 On an alternate Earth, Superman captures Stalin and Hitler and brings them to
trial for war crimes.  [Look Magazine, 1943]
February
 Tex Thomson is declared dead after a bomb sinks his vessel; a disheartened Miss X
abandons crimefighting.  Tex Thomson secretly becomes Mr. America.
  [Bernard Bailey]
March
 Lando, Master of Magic has first public case [World's Best #1]
 Henry Heywood becomes Steel  [Gerry Conway & Don Heck]
April
 Theodore Knight has first public case as Starman in Gotham City (later Capitol City).  [Jack Burnley & Murray Boltinoff] [Adventure #61] May
 Tom Longacre drinks the soda-pop known as Gingold to gain the ability to 
stretch his body and begins his career as Stretch.  [Bob Rozakis & Stephen DeStefano] [Hero Hotline #1]
 After initiation "stunts", Johnny Thunder joins the JSA as a full member;
the Flash takes honorary status and GL becomes chairman.   
June
 Hop Harrigan becomes Guardian Angel  [John Blummer]
 Shiera Saunders becomes Hawkwoman (later Hawkgirl)  [Gardner Fox/Sheldon Moldoff]  [All-Star #5]
 JSA, along with non-members, defeat Ian Karkull, who bathes most of them
with mystical radiation, retarding their aging. Green Lantern takes leave
of absence, Hawkman becomes the chairman, Hourman takes leave of absence.
July
 John Sargent becomes Sargon  [All-American #26]
 Theodore Grant becomes Wildcat,July 19th (date from the 1976 Super DC Calendar).  [Bill Finger & Irwin Hasen]  [Sensation #1]  
[Note:  Ted Grant appears to have been born in Gotham City, in one of the 
Adventure Comics "Justice Society" stories, but to have spent much of his 
professional career in New York City as confirmed in All-Star Squadron Annual #1.
By 1968 however he is confirmed as the resident superhero of Knickerbocker City in
The Spectre #3, but later returning to his "roots" in Gotham.]
August
 Bart Hawk has first public case as Blackhawk.  [Charles Cuidera & Bob Powell]  [Military #1]
 Patrick "Eel" O'Brian becomes Plastic Man  [Jack Cole]  [Police #1]
September
 Johnny Chambers becomes Johnny Quick  [Mort Weisinger & Mort Meskin]
 Shining Knight becomes Justin Arthur and has first public case in 20th c. [Creig Flessel]
 The Flash takes honorary status in the JSA; Johnny Thunder formally 
inducted as member.
October
 Richard "Buck" Dare becomes Captain X of the R.A.F.  [Gardner Fox & John Blummer]  [Star-Spangled #1]
 Sylvester Pemberton & Patrick Dugan become Star-Spangled Kid & Stripesy in
Civic City.  [Jerry Siegel & Hal Sherman]
 Jonathan Law becomes Tarantula.  [Mort Weisinger & Al Avison]
 Realizing that the Helm of Nabu allows Nabu to control him, Kent Nelson begins 
using a half-helmet instead.  [More Fun #72/All-Star Squadron #23]
November
 Arthur Curry becomes Aquaman.  [Mort Weisinger & Paul Norris]
 Robert Daley becomes Fat Man.  [Bernard Bailey]
 Oliver Queen has first public case as Green Arrow in Star City.  [Mort Weisinger & George Papp] 
 Roy Harper has first public case as Speedy. [Mort Weisinger & George Papp] 
 Greg Saunders becomes the Vigilante on November 27.  [Mort Weisinger & Mort Meskin]
 Billy Gunn has first public case accompanying Vigilante. [Mort Weisinger & Mort Meskin]
December
 Percival Popp has first public case as "the Super Cop".    [More Fun #74]  [Bernard Bailey]
 Sanderson Hawkins becomes Sandy the Golden Boy. [Bob Kane/Whitney Ellsworth/Chad Grothkopf/Paul Norris]
 Wonder Woman becomes Diana Prince and has first public case in Washington D.C.  [William Moulton Marston & Harry G. Peter]
 start All-Star Squadron  [Roy Thomas]
 Green Lantern takes honorary membership in the JSA; Dr. Mid-Nite and Starman 
"win their spurs" as new members.  Hooty is made the JSA mascot.  [All-Star #8]

1942
========================
January
 Charles Collins, possessed by the soul of Keith Everet, the Earl of Strethmere,  
becomes the Gay Ghost  [Gardner Fox & Howard Purcell]  [Sensation #1]
 Thomas Rogers becomes Little Boy Blue, accompanied by his friends Tommy and
Tubby as the Blue Boys.  [Bill Finger & Jon Blummer]  [Sensation #1]
 Terrence Sloane becomes Mr. Terrific in Gateway City.  [Charles Reizenstein & Hal Sharp]  [Sensation #1]
 Will Everett becomes Amazing Man  [Roy Thomas & Jerry Ordway]
 On trial as a public menace, Robotman reveals that he is Robert Crane's 
brain in a robot body; the court declares him a human being. 
February
 Larry Jordan becomes Air Wave  [Mort Weisinger & Lee Harris]  [Detective #60]
 Jimmy Martin assists Hourman as Minuteman  [Adventure #71]
 Daniel Leong becomes Stuff the Chinatown Kid.
 Firebrand II, Johnny Quick, Liberty Belle, and Starman battle Tsunami (Miya Shimada).  [All-Star Squadron #33]  
 Infinity, Inc. travels from the year 1978 and confront the All-Star Squadron.  [All-Star Squadron #24]
 Captain Marvel, Captain Marvel Junior, and Mary Marvel are magically transported 
from Earth-S to Earth-2's Berlin. Under Hitler's spell, Captain Marvel attacks 
England and butts heads with Superman, Wonder Woman, Batman, the  Flash, Green 
Lantern, and Plastic Man.  [All-Star Squadron #36]
 Needing help to battle Doctor Poison, Wonder Woman recruits Etta Candy and 
ninety-nine other girls from the Beeta Lambda Holliday College for Women in 
Washington, D.C.  They become known as the Holliday Girls (known members 
include Betty, Brenda, Dorothy Lord, Eve Brown, Faith Alden, Gay, Gell Osey, 
Glamora Treat, Hester, Janet Foster, Jean Townsend, Lillie, Lita Little, 
Lorrie, Marcia, Marcy Young, Mary Lane, Patsy Peters, Selina, Roberta "Bobbie" 
Strong, Ruth Rorick, Susan Tardee, Tina Toy, Thelma Tall, Tress Akter, 
Virginia True, and Millie & Tillie Heyday).  [Sensation #2] 
 J. Edgar Hoover voted in as Associate Member of the JSA.  [All-Star #9]
April
 James Harper becomes the Guardian, then becomes legal "guardian" for
members of The Newsboy Legion  [Joe Simon & Jack Kirby]  [Star-Spangled #7]
 Paul Kirk becomes Manhunter in Empire City. [Joe Simon & Jack Kirby]  [Adventure #73]
 On Earth-2A, Rick Nelson becomes Manhunter  [Joe Simon & Jack Kirby]  [Adventure #73]
 Dr. Robert Crane becomes Robotman  [Jerry Siegel & Joe Schuster]  [Star-Spangled #7]
 Thomas N. Thomas & Daniel Dunbar become TNT & Dan the Dyna-Mite  [Mort Weisinger]  [Star-Spangled #7]
May
 Paula Brooks has first public case as the Tigress  [Roy Thomas & Jerry Ordway]
 Thorndyke assists Hourman as Second Sweep  [Adventure #74]
 Superman takes on an occasional sidekick, the teenaged inventor named Tim.  [Superman-Tim]
 start Ghost Patrol (Fred, Pedro, and Slim)  [Ted Udall & Frank Harry]  [Flash #29]
 JSA disbands, all save the Spectre join Armed Forces; start Justice Batallion.
 [speculation]  On an alternate Earth, start the Teen Titans (Stripesy/Pat Dugan, 
Amazon Prince/Marvin White, Arsenal/Roy Harper, Dr. Fate Jr./Eric Strauss, Kid 
Spectre/Casper Freeman, Li'l Atom/Ray Palmer).  [Ty Templeton]  [Elseworlds 80-Page Giant]
July
 Wonder Woman inducted as JSA secretary.
 Superman builds his Secret Citadel in the mountains outside Metropolis.  [Superman #17]
 On an alternate Earth, the Justice Society and then the universe is
destroyed by a visiting Mr. Mxyzptlk and Bat-Mite of Earth-1.  [World's Funnest] Autumn
 Winky Moylan, Blinky Boylan, and Noddy Toylan, three would-be crooks who make a 
general mess of things but who aren't truly evil, are sort of adopted by the Flash as
"the Three Dimwits."  [All-Flash #5]
August
 Johnny Jones becomes Genius Jones, the Answerman.  [Alfred Bester/Stan Kaye]  [Adventure #77]
 Independently stopping the agents of the Hand, Crimson Avenger & Wing,
Green Arrow & Speedy, Shining Knight, Star-Spangled Kid & Stripesy, and
Vigilante join together to become the Seven Soldiers of Victory.  Auxiliary
members over the years include Billy Gunn, Stuff, and The Spider.
September
 start Americommandos, carrying out undercover operations in Europe while disguised 
as German officers (Americommando & Fat Man)
November
 Drusilla, of Paradise Island, has first case as Wonder Girl.
 start Creature Commandos.
 Mr. Mind travels from Earth-S.  He recruits Oom, Nyola, Nightshade 
(a.k.a. Ramulus), and Mr. Who to form the Monster Society of Evil, which 
battles Dr. Fate, Hawkgirl, Hourman, and Sandy.  [All-Star Squadron #51]
Winter
 Boy Commandoes have first public case.  [Joe Simon & Jack Kirby]
 Elisabeth Lawrence becomes Liberty Belle  [Don Cameron & Chuck Winter]

1943
========================
January
 Volto (from Mars) arrives on Earth, has first public case.
June
 A modern-day Robin Hood has adventures before becoming cynical and allying
himself with criminals.  He dies intercepting a bullet intended for Lois Lane.  [Superman #22]
 Justice Society drop the name "Justice Battalion"; Justice Society move their
HQ from Smithsonian Museum to the Perisphere in NYC
Winter
 Vandal Savage allies himself with the Axis powers, conspiring to make himself 
the new chief of war labor in the U.S. in hopes of sabotaging American military 
production.  He is challenged and defeated by Green Lantern, apparently falling 
to his death.
November
 The Vagabond, "Uncle Sam's European counterpart", has first case publicised in
America.  [National #37]
 On Earth-2A, army private Sam Stupe falls off a cliff; Superman, flying overhead, 
gives the lad a super blood transfusion.  Sam Stupe becomes Super Sam.  
[Jerry Siegel & Ben Bryan]  [an armed forces magazine, probably Yank]

1944
========================
January
 An explosion in the city of Rome awakens the Roman god Mercury from his centuries-
long sleep.  He creates pandemonium in Metropolis under the name 'The Quicksilver
Kid' before being defeated by Superman.  (note:  this probably contradicts accounts 
in Wonder Woman, leading one either to assume the Greek and Roman pantheons are 
distinct, and Wonder Woman has had dealings with Hermes, or that Mercury's timeline 
overlaps in some way as does Superman and Batman's (twice!) cf. 2956 and 2957 entries)  [Superman #26]
Summer
 On Earth-C, Merton McSnurtle of Zooville is selected by gods from another planet 
for good on Earth; equipped with an automatic conscience that doesn't leave him 
alone for a second, he becomes The Terrific Whatzit. [Martin Naydel]  [Funny Stuff #1]
December
 U. S. Representative Thomas K. Cole is given the Disc of Mars and briefly becomes 
the Bombardier.  [Jack C. Harris]  [Wonder Woman Spectacular 1978]
Winter
 Daniel Leong's brother Victor takes over his brother's role as Stuff, The
Chinatown Kid

1945
========================
Spring
 Dr. Fate, Sandman, Spectre and Starman take leaves of absence from JSA membership; 
Wildcat and Mr. Terrific become provisional members of the JSA.
June
 Neptune Perkins and Hawkman first team up; capture a gang of criminals  [Flash #66]
August
 All-Star Squadron disbands
Winter
 Blinky Boylan, of the Three Dimwits, hypnotises himself into turning into a superhero 
called Muscleman.  [All-Flash #13]
December
 Edward Sloane briefly becomes Doctor Nil in Gateway City.  [JSA: All-Stars #7]

1946
========================
January
 Stretch Skinner brefly becomes Tomcat [Sensation #49]
March
 death of Paul Kirk/Manhunter II; resumes big game hunting only to be killed by 
the charge of a bull elephant. [Detective #439]
 Sandy transformed into silicon monster, Sandman retires.
April
 Lady Fear has first case publicised in the West.
May
 Hawkman & Hawkgirl befriend the winged inhabitants of the hidden city of Feithera.  [Flash #71]
October
 Hop Harrigan briefly becomes The Black Lamp.  [All-American # 78]

1947
========================
February
 Superman publishes his autobiography, entitled The Confessions of Superman [Ace
Publishing Co.], with his share of the proceeds donated to charity.  [World's Finest #26]
August
 Dinah Drake becomes Black Canary in Park City (later Gotham) [Robert Khaniger & Carmine Infantino]  [Flash #86]
 Paula Brooks (formerly Tigress?) begins criminal career as the Huntress  [Sensation #86]
 Ted Grant (Wildcat) and his girlfriend Irina have a son, Jake, who is kidnapped 
shortly after birth by Wildcat's old enemy, the Yellow Wasp. Neither the child nor 
the Yellow Wasp are ever seen again.
September
 Green Lantern has first clash with the Harlequin (Molly Mayne).  [All-American #89]
December
 Johnny Quick visits Africa where he encounters the "Antelope Boy," can run faster 
than 60 miles an hour.  He brings the boy back to America, where Antelope Boy assists 
him on a case and eventually is invited to join a college track team.  [Adventure #123]  [Don Cameron & Mort Meskin]

1948
========================
February
 Meredith Pemberton becomes Merry the Gimmick Girl  [Otto Binder]  [Star-Spangled #81]
March
 In India, an Indian maharaja inspired by seeing Robin in Gotham City adopts the 
role of Rajah Rahbin, donning the same costume save for the addition of a turban.  [Star-Spangled #78]
July
 Black Canary joins the JSA.
August
 The Stalker travels from his alternate dimension and battles the JSA.  Interaction
with one of his lackeys acts as a catalyst to Al Pratt's system, already altered in
his battle with Cyclotron, and he develops superhuman strength.  [James Robinson]  
[date from Flash Comics #98 and All-Star Comics #42, first appearences of his 
new costume]  [post-Crisis substitution:  this event takes place during WW2]

1949
========================
March
 The JSA moves its headquarters from Gotham City to Civic City.  [All-Star #45]
February
 Jay Garrick retires as a full-time crimefighter, although he continues
to attend meeting of the Justice Society.  [Flash #123]
June
 Jay Garrick marries Joan Williams.  [Flash #134]  [his adventures as portrayed
in All-Star Comics at this time must be slightly inaccurate in their portrayal 
of his personal life]
 Regor, the super-champion of the planet Uuz, has adventure on Earth.  [Superman #58]
 On Earth-2A, Clark Kent marries Lois Lane.  Shortly thereafter they have a son, Joel.  
[Amazing World of DC Comics Special Edition #1 / World's Finest: Generations #2]  
[E. Nelson Bridwell, John Byrne]
September
 By showing him visions of various possible futures, the JSA helps a dying boy 
named Edmund Blake find the will to live.  The images of the future seen in this 
issue in actuality show the Earth-2A JSA in action in the mid-1950's, although on 
Earth-2 the team would be disbanded by then. 
November
 Clarence Pierce briefly becomes Wireboy  [Star-Spangled #98]
December
 Seven Soldiers of Victory battle Nebula Man, are betrayed by auxiliary member The 
Spider, and are timelost; death of Wing.  (date given in Stars and STRIPE was 1948. 
I have taken the date of the last appearance of the Shining Knight's strip; the Golden 
Age Green Arrow continued publication until 1955 or so but that seems too late to me.  
The 1976 Super DC Calendar lists this date as June 28)

1950
======================== 
 The Earl of Wordenshire and his son Cyril have first case publicised in
America as the Knight and the Squire.
 The Spider I is slain by a the Shade.  [James Robinson]  [The Shade #3]
April
 Dr. Gordon Star has been found to be selling atomic secrets to foreign
powers. Professor Rome and Johnny Peril find Star in an abandoned lighthouse
who wants to demo his time machine for them, which he will use to escape.
[he also has a time viewing screen by which the pair can watch his
progress]. First stop: 2050 [beautiful cities], then to 5000 [robot slaves],
25000 AD [interplanetary travel], 50000 AD [just wilderness], 100000 AD [man
has become primitive]. Plans to return to 2050 but machine can only go
forward -- both moon and sun closer to earth. Hot. Then 20M into future.
Earth dead. Keeps going and time ends -- then restarts. Sees dinosaurs,
early man, Egyptians, Vikings, WWI, then back to 1950 where he ceases to
exist.  [All Star Comics #52]
August
 Superman is confronted with his first Kryptonian menace:  Mala, Kizo and U-Ban, 
three super criminals who had been shot into orbit by his father, Jor-El, and thus 
survived the destruction of the planet.  (note: this is the last time the contention 
is made that everyone on Krypton has had the ability to run at super speed and leap 
an eighth of a mile, etc.)  [Superman #65]
Winter
 A spell cast by the Wizard, intended to eliminate Superman, causes Clark Kent to forget 
his identity as Superman for nearly a year.  [Action #484]

1951
========================
January
 Tom Sparks, Boy Inventor has first public case. [World's Finest #49]
February
 After nearly being killed by Eliminations, Inc., the JSA is called to appear 
before Congress on charges of consorting with a foreign agent. When asked to 
unmask and reveal their true identities, the JSA opt to disappear dramatically 
from the hearing and disband.  Note:  Vandal Savage has claimed responsibility 
for the JSA's retirement; it is unclear whether this is true or just braggadocio 
on Savage's part. 
March
 [speculation]  With technical support from other retired members of the JSA, 
Charles McNider becomes Starman II, an emergency catchall identity taken by 
various JSA members in response to their forced retirement.  This practice lasts 
at least until September 1957, when Bruce Wayne briefly dons the identity.  [Starman #77, Detective Comics #247]
June
 Wingman has first public case assisting Batman.  [Batman #65]
November
 Robotgirl has first public case.  [Detective Comics #177]

1952
========================
October
 Joanie Swift becomes the queen of speed [Adventure Comics #181]

1953
========================
 Richard Carter becomes Mysto, Magician Detective
 Fred Venable briefly becomes the Human Target  [Detective #201]
 On Earth-2A, Green Arrow joins the JSA.  [Generations II]  [John Byrne]
January
 Halk Kar (Earth-2 counterpart of Mon-El) of the planet Thoron, with powers 
similar to but not as great as Superman's, has adventure on Earth (note:  as 
Superman was amnesiac during this period, adventure occurred probably prior to 
stated date).  [Ed Hamilton & Al Plastino]  [Superman #80]  
March
 Tharka, the Superwoman of the planet Zor, has adventure on Earth (note:  as 
Superman was amnesiac during this period, adventure occurred probably prior to 
stated date).  [Superman #81]
June
 Clark Kent marries Lois Lane. On their wedding night, Lois discovers that Clark is 
Superman. Clark shortly recovers his memories and reclaims his Superman identity.   [Action #484]
September
 Roh Kar has adventure on Earth as the Manhunter from Mars [Batman #78] 
 Clark Kent becomes the managing editor of the Metropolis Daily Star after 
the retirement of George Taylor.  [Superman Family #197]
December
 Lana Lang becomes Insect Queen [Superman Family #213]

1954
========================     
 Sioux Indian Great Eagle and his son have first case publicised in Gotham
as Chief Man-of-the-Bats and Little Raven.  [Batman #86]
September
 Clark Kent/Kal-L briefly becomes Mental Man [Action Comics #196]

1955
========================
October
 Bruce Wayne marries Selina Kyle  [Superman Family #211]

1956
========================
July
 Kathy Kane becomes Batwoman [note: original publication date;  Earth-2 
Batwoman's career starts prior to 1955, probably postwar heroine]  [Edmond Hamilton]

1957
========================
June
 Bruce Wayne and Selina Kyle have a daughter, Helena Wayne (Huntress II). [Last Days of the JSA]
July
 Clark Kent/Kal-L briefly becomes Lightning Man [World's Finest #89]
 start Club of Heroes (Batman, Gaucho, Legionary, Musketeer, Superman, Knight & Squire).
August
 Donald Bard briefly brandishes the hammer of Thor.

1960
========================
 Batman, Robin, and Batwoman battle the Star-Man III  [Detective #286]

1961
=======================
 Barry Allen travels to Earth-2 from Earth-1; first human alternate-Earth 
encounter since the 1940's.

1963
========================
 Albert Elwood briefly becomes The Crimson Avenger II
February
 On Earth-1, The Justice League meets the Tornado Champion.
 Wonder Woman marries Steve Trevor. [Wonder Woman #300]
June
 JSA members are captured by Vandal Savage in a revenge plot; they are rescued by Jay Garrick and 
Barry Allen, and decide to officially revive the JSA.
November
 Hector Hall (Silver Scarab/Sandman III) is born to Carter and Shiera Hall in Cairo, Egypt.

1965
========================
February
 Hippolyta "Lyta" Trevor is born to Wonder Woman and Steve Trevor.  [Wonder Woman #300]
June
 The Immortal Man has first public case.  [Jack Sparling]  [Strange Adventures #177]

1966
========================
June
 Doiby Dickles leaves the Earth to marry the alien princess Ramia from the planet Myrg. [Green Lantern #45] 
 "Q-energy" is brought from Earth-2 to bedevil the Earth-1 Green Lantern.  It had 
also been used offensively on November 1962 against the Earth-1 Flash [Flash #132] 
and against the Earth-1 Superman [Superman #204].  Note:  The nature of "Q-energy" 
remains mysterious, but the Green Lantern tale is the only one in which its 
dimension of origin has been revealed.

1967
========================
 Robin joins the JSA.  [preferred post-Crisis substitution:  Sanderson Hawkins]
March
 The Immortal Man has last public case ("The Apes With Bizarre Powers"); shortly after this 
he presumably emigrates to Earth-1.  [Jack Sparling]  [Strange Adventures #198]

1968
========================
 William MacIntyre discovers that his father is a petty thug in the employ of the aging 
Dr. Cobalt late one night after tailing the elder MacIntyre. When Hourman engages Dr. Cobalt 
in combat, Will saves the hero from a magnetic blast. 
September 29
 Tornado Champion becomes Red Tornado II, joins the JSA (after some initial confusion over 
whether s/he was original member Ma Hunkle) (date from 1976 Super DC Calendar).

1969
========================
 On Earth-2A, Richard Grayson and Bruce Wayne, Junior (the son of Bruce Wayne 
and Kathy Kane) begin their careers as Batman II and Robin II [Batman #131 and #146, World's Finest: Generations #2]

1972
========================
May
 [speculated by Doc Quantum]  Since Vandal Savage was unsuccessful in using the original 
Earth-2 meteor from Flash #215 to restore his lost immortality, and his scheme to steal it 
from the Earth-2 Superman didn't work, he traveled to Earth-1 in order to discover whether 
there was a similar meteor in that world, and after he found it his immortality was restored 
by it, in an untold story, before his next appearance battling the Earth-1 Superman in which 
his immortality is back.
August - October
 Seven Soldiers of Victory return; apparent death of Red Tornado II  [JLA #100-102]

1976
========================
February
 Kara Zor-L has first public case as Power Girl  [Gerry Conway & Wally Wood]
 start Super Squad (Power Girl, Robin, Star-Spangled Kid, + JSA)
March
 Mikaal Tomas comes to Earth, briefly becomes Starman IV  [Gerry Conway & Mike Vosburg]  [First Issue Special #12]

1977
========================
 Vandal Savage works in a series of biochemical projects, including
Project Telemachus. In that project, Savage collects DNA samples from his
"encounters" with the JSA and the JLA.  Egrin Wahrman grafts these samples
to the DNA of a child who already had metagenetic potential:  Grant
Emerson, the son of Al Pratt.
June
 death of Selina Kyle (Catwoman).  [DC Super-Stars #17]
 Helena Wayne becomes the Huntress; joins JSA  [Paul Levitz & Joe Staton]  
[preferred post-Crisis substitution:  Black Canary II]

1979
========================
April
 death Batman in combat with William Jensen, revealed to be a pawn of 
sorceror Frederick Vaux [Adventure #462]
July/August
 Charles Bullock assists Wildcat [Adventure #464]
October
 death Mr. Terrific, slain by the Spirit King, possessing the body 
of Jay Garrick  [JLA #171]

1980
========================
February
 Wonder Woman reveals her secret identity as Diana Prince to the world.  [Wonder Woman #300]

1981
========================
January
 Vandal Savage emigrates to Earth-1 to collect cell samples for use in Project 
Telemachus.  He encounters Superman during this time.  [Action #515]  It is
possible that in his emigration he crossed time as well, emerging on Earth-1 in 
the 1920's to encounter Hans von Hammer, Bat Lash, and Biff Bradley.  [Guns of the Dragon #1-4]
 death of Crimson Avenger I

1982
========================
November
 Charles Bullock becomes Blackwing  [Paul Levitz & Joe Staton]  [Wonder Woman #297]

1984
========================
 William MacIntyre becomes Triumph
May
 Fury (Hippolyta Trevor), The Huntress, Jade (Jennifer-Lynn Hayden), Northwind 
(Norda of Feithera), Nuklon (Albert Rothstein), Obsidian (Scott Rice), Power Girl, 
Silver Scarab (Hector Hall) and Star-Spangled-Kid start Infinity, Inc. [Roy Thomas & Jerry Ordway]  [Infinity, Inc. #3]
June
 Vandal Savage's last reported appearance on Earth-1.  After confronting his old
foe the Immortal Man (accompanied by Superman and the Forgotten Heroes), he returns
to Earth-2 to begin work on DNA grafting.  [Action #556]

1985
========================
September
 Yolanda Montez becomes Wildcat II  [Crisis #6]
December
 Beth Chapel becomes Dr. Midnight  [Infinity, Inc. #21]
 Richard Tyler, son of Rex Tyler and Wendi Harris [speculated to be the daughter 
of Gotham detective Harvey Harris], becomes Hourman II  [Infinity, Inc. #21]

1986
========================
March
 Superman and Lois Lane Kent depart Earth.  (note: this speculation, which 
corresponds to their passage to another realm in Crisis #12, explains the 
absence of a contemporary Superman in A.D. 2000, though leaves unclear from 
where their descendents, including Lois 4XR, operate; the postulated 'Supertown' 
may be farther from Earth than originally thought).
October
 Sylvester Pemberton becomes Skyman.
 Dr. Midnight, Hourman II, and Wildcat II are admitted as full members of 
Infinity, Inc.  [Infinity, Inc. #31]

1988
========================
January
 Marcie Cooper, granddaughter of Dan Richards, steals the goggles of the original 
Harlequin and becomes Harlequin II.  [Infinity, Inc. #46]
June
 death of Skyman (murdered by Harlequin II).  Infinity, Inc. disbands.  [Infinity, Inc. #52]

1989
========================
 Hero Hotline is founded by Harry "Tex" Thomson.  Note: a one-panel cameo character 
from HH #4 featured a character named Ms. Terrific.  Her relationship to the Sloane 
family is unknown, though speculation has it that she later became the villainess 
known as Roulette.  [Bob Rozakis & Stephen DeStefano]  [Hero Hotline #1]
 [speculation] Halk Kar, Marsman, Mekanique, Mikaal Tomas, and Triumph join forces 
as The L.E.G.I.O.N. (Licensed Extra-Governmental Interplanetary Operatives Network).  

1992
========================
August
 Jesse Chambers has first public case as Jesse Quick  [JSA #1]

1994
========================
April
 Grant Emerson becomes Damage [Tom Joyner & Bill Marimon]  [Damage #1]
May
 On Earth-2A, Kyle Rayner becomes Green Lantern II  [Ron Marz & Bill Willingham]  [Generations #3]
August
 Deborah Perkins, daughter of Neptune Perkins & Tsunami, becomes Deep Blue.  [Aquaman #23]

1997
========================
June
 Michael Holt becomes Mr. Terrific II [Spectre #54]

1998
========================
 Jim Corrigan completes his tenure in the mortal world. His funeral is attended by 
the Flash, Alan Scott, Wildcat, Ted Knight, Mr. Terrific, the JLA and others. The 
Spectre returns to limbo to await a new mortal host.  [Spectre #62]

1999
========================
 Dr. Pieter Cross becomes Dr. Mid-Nite II  [Dr. Mid-Nite #1]
August
 death of Dian Belmont.    [JSA Secret Files #1]
 death of Wesley Dodds, the Sandman.    [JSA Secret Files #1]
 Albert Julian Rothstein becomes Atom-Smasher  [JSA Secret Files #1]
 Kendra Saunders becomes Hawkgirl II [JSA Secret Files #1]
 Courtney Whitmore becomes Star-Spangled Kid II  [Stars & STRIPE #1]
 Patrick Dugan becomes S.T.R.I.P.E.  [Stars & STRIPE #1]

2000 
========================
 Soseh Mykros has first public case as Nemesis.  [JSA Annual #2]
 Lucas Ludlow-Dalt becomes The Spider II.  [Stars & STRIPE #9]
January
 Black Adam travels from Earth-S and battles the JSA, later offering to
reform, and joins the team as probationary member.  [JSA #6]
 Superman is brought from April 1959 by the "futuremen" Vard and Boka to 
discover that Earth's oceans are gone, "accidentally dissolved by an atomic 
experiment" (which evidently killed the remaining JSA members as well).  
Superman defeats the villainous Boka and his sidekick, then replenishes 
Earth's oceans by towing several of Saturn's frozen moons to Earth.  [Note:
given other developments, this story probably takes place centuries after 
the stated date.]  [Superman #128]

2001
========================
February
 Jakeem (JJ) Thunder has first public case.  [JSA #19]
 On an alternate Earth, Air Wave II, Black Condor II, Damage, Dr. Occult, 
Iron Munro, JJ Thunder, Jade, Nemesis, Phantom Lady II, The Patriot, The Ray II, 
Power Girl, Shining Knight, S.T.R.I.P.E., Vigilante (Greg Saunders) and 
Vigilante (Pat Trayce) are active as the JSA Auxiliary.  [JSA Annual #1, 
"Our Worlds at War"]  [Note: Jessie Quick and Deep Blue were regrettably 
absent, and I haven't the patience to back-retcon this odd assemblage into
Earth-2 continuity.]

2003
========================
 Catalina Flores becomes the Tarantula II in Bludhaven. It is possible she 
interacts with Robin or Blackwing who may have emigrated there from Gotham 
City.  [Nightwing #75]  [Devin Grayson & Rick Leonardi]
 An unknown woman obtains the guns of Lee Travis and becomes the Crimson 
Avenger III.  [JSA #53]

2004 (approx)
========================
 Shawn Solomano becomes Boy Blue.
 Harris D. Ledbetter purchases the rings of Dan the Dyna-Mite off of ebay 
and becomes Dyno-Mite Dan.
 Jacqueline Pemberton becomes Gimmix.
 Thomas Ludlow-Dalt II becomes The Spyder.
 Shelley Gaynor, columnist for the New York Daily Recorder, becomes The Whip II.

2005  
========================
February
 Vigilante, Boy Blue, Dyno-Mite Dan, Gimmix, The Spyder, The Whip II and one 
other (Bat-Girl? Shining Knight? Crimson Avenger II or III?) join together 
to become the second incarnation of The Seven Soldiers of Victory.  They are 
soon betrayed, and slain by the interdimensional Sheeda.  [Seven Soldiers of Victory #0]

2006
========================
 Power Boy (Zarl Vorne?) has adventures?  [Teen Titans #34]  [Geoff Johns & Tony
Daniel]  [Note: Fourth World references may entail Earth-1 placement.]

2020
========================
 On Earth-2A, Wonder Woman and Etta Candy take some water from the spring 
of eternal youth on Paradise Island and isolate the Life Vitamin L-3, which 
is the substance that keeps the Amazons young. They make L-3 available to 
everyone on Earth, thus ending aging. Hence they all would stay young 
throughout the centuries (but it doesn't explain why Diana would be content 
to stay General Darnell's secretary for 1062 years). There's no reference to 
exactly when this happened, except to say that it is "many years in the future" 
from the 1944 date of the story, and Etta's mother is 82 and dying, which is 
why Etta and WW found L-3.  [Wonder Woman #7]

2023
========================
February
 Rex Cosmos, Professor Shanley, his daughter Joan and the wimpy Axel Yoke
become the Super-Police.  They travel via an all-purpose vehicle called
the Hi-Lo that could go into space, underwater, etc.  Their first foe is
Captain Kiddlaw, Òthe wizard-pirate.Ó [New Fun #1] [Ken Fitch & Clem Gretter]

2050
========================
 Batman & Robin travel from 1950 and assist Gotham City Police Chief Rokej
(descendent of the Joker) in exposing Erkham, an industrial saboteur.  [Batman #59]

2051
========================
 A 20th century villain, Prof. Toz, takes over the city of New Metropolo 
and erases all mention of Wonder Woman, who arrives from 1951 to investigate 
and takes Toz into custody.  [Sensation #103]

21st century
========================
 Patricia Dugan becomes Starwoman.  [Starman #50]

2150
========================
September/October
 Astra, Girl of the Future has first public case as ace telecaster for 
Transworld News, often accompanied by her traveling companion Professor
Rockwell.  [Sensation #99]  [Robert Kanigher]

2300
========================
 The criminal Tibro travels back to the year 1952, where he becomes
known as the Crime Master of Time.  [Wonder Woman #53]

23rd century  
========================
 The Great Wars of the 23rd century occur.  The city of Metropolis comes
under the demagoguery of the scientist Rotwang (possible descendent of
Alexei Luthor?).  After being defeated by Joh Freder (possible descendent
of Kal-L?) in his attempt to undermine a worker's revolt by replacing the
workers' leader, Maria, with a robot, Rotwang sends the robot back in time
to change history in his favor.  The robot appears in the year 1942, where
Robotman dubs it Mekanique.  Mekanique persuades members of the All-Star
Squadron to complete her task, thus ensuring Rotwang's dominance.  [All-Star Squadron #60]
Note:  The Elseworlds where the Super-Man once fought Lutor, and Bruss 
Wayne-Son took the alias of the Nosferatu, has been designated by John 
Wells as Earth-1927. 

2442  
========================
 Using Dr. Everson's time ray, the JSA travel from April 1942 in order to 
retrieve a Bomb Defense Formula.  [All-Star #10]

2446
========================
 Landor, a thrill-seeker, travels to 1946 and battles the JSA.  [All-Star #29]

2447  
========================
 Bored with the law-abiding existence where crime has been largely eradicated,
Knodar (deemed "The Last Criminal") seeks other eras to practice his crimes; 
pursued by a man named Dalmyr, he travels from here to October 1947 to battle 
Green Lantern, is defeated and sent back.  [Green Lantern #28]  He nevertheless
returns to the 20th century on at least three other occasions (including one
to August 1948 [All-American #100]).
 
2500
========================
 Rod Rian keeps the space lanes free of pirates as an agent for the Inter-Planetary 
Police (or "Sky Police").   [Gardner Fox & Paul Jepson]  [Flash #2]

2949
========================
 Lois 4XR, descendent of Clark Kent and Lois Lane, visits March 1949 and 
has brief career as Superwoman.  (note: the assertion that all the inhabitants
of this time period are super-powered contradicts numerous other texts, notably
the career of Craig King.  speculation:  Kryptonian descendants are segregated 
in a "Supertown"-like environment which may have been destroyed by the Saturnian
invasion in the late 30th century.  whatever the details, Lois 4XR is clearly 
the Earth-2 counterpart of Laurel Kent,)  [Superman #57]

2950
========================
 Detective Dan Rafferty chases criminal Weepy Wilson, who stole Prof. Fairchild's 
time ray from February 1951.  Weepy finds there is no place to hide as the entire 
alternate future earth is now populated.  [Strange Adventures #4]

2956  
========================
 Superman awakes from suspended animation from August 1956 and battles the
renegade scientist Drago, who escapes from his moon-based prison and attempts
to conquer the world.  Superman eventually returns to his own era via time
machine; these events may inspire Craig King.  [Superman #107]
 Craig King, telenews reporter for The Daily Solar System under the
employ of Parri Wyte, uses scientific gadgetry - including "concealed jet 
units for flight" and "a concealed degravitator to make heavy things light" - 
that enables him to simulate, albeit somewhat imperfectly, some of Superman's 
powers.  Donning a costume identical to Superman's he has a brief career as a 
crimefighter, before summoning the original Superman from April 1956 to his 
time for help.  [Action #215]

2957
========================
 Superman, Batman & Robin awake from suspended animation, placed there in 
December 1957 by the criminal Rick Harben, and defeat the villainous Rohtul 
(descendant of Luthor) before returning to their own era via a time ray.  [World's Finest #91]

3000  
========================      
 Brane and Ricky are inspired by time capsule footage of Batman and Robin
to don similar guises to liberate Earth from domination by the Saturnian
warlord Fura.  [Batman #62]
 Jor-L, nonpowered descendent of Superman, re-establishes law and order
following the departure of the Saturnians, as a member of the Federal Men.  [Jerry Siegel & Joe Schuster]
  On Earth-2A, The first woman president, Arda Moore, is elected. [Wonder Woman #7]

3004
========================
 On Earth-2A, after four years of Arda Moore's government, a men's party, 
called the Purple Shirts, is formed by Professor Manly. Manly proposes that 
in the upcoming election, Steve Trevor should run for President with Manly 
as vice-president. Despite Diana Prince's warning that she suspects Manly 
is up to no good, the egotistical Trevor agrees to run. Arda Moore refuses 
to run against Trevor, so Diana puts herself on the ballot as the woman's 
party candidate, with Etta Candy as her running mate.  When the election 
results are counted, Manly's Purple Shirts rig the election so that he and 
Trevor win, and then gets Trevor out of the way so that he can rule as 
acting president. Diana investigates as Wonder Woman and exposes Manly's 
fraud.   With the ballots recounted, Diana Prince is elected President.  [Wonder Woman #7]

3051        
========================
 Brane Taylor and his nephew become Batman and Robin of the year 3051 after 
perusing historical "micro-films" of Batman's exploits, battling villains
including the villainous space pirate Yerxa.  [Batman #67]

31st century  
======================== 
 The JSA travels from January 1951 to save humanity from Knelo and his race 
of shape-changing "chameleons".  [All-Star #56]

35th century        
========================
 The Shining Knight time-travels to 3450, being sent there by an addled 
Merlin rather than the intended 1950.  [Adventure #159]

60th century
========================
 The historian Ka Thar travels to April 1956 via a time-thrust projector
to verify the accuracy of his book, The History of Superman and Batman. 
We learn the crime fighters' secret identities were not revealed until 
centuries after their deaths.  [World's Finest #81]

circa 7432 
========================
 The solar system is joined by an alien planet which exerts terrible gravitational
pull on the Earth.  Only one man, called the Coordinator, is able to overcome 
it by "coordinating the polar pull with the cosmic vibratory influences 
and  counterbalancing the gravitation lift by the sidereal forces."    [Sensation #28]

7532  
========================
 Black Barax kidnaps the Coordinator, taking him to his headquarters in 
"the Western Ocean" (what we know as the South Sea Islands in the Pacific), 
as part of a plan to become world tyrant.  Mr. Terrific is brought forth 
from 1944 to the city state of Kikago (Chicago), to defeat Barax.  [Sensation #28]
  
40,000 A.D.
========================
 The Thing, a highly intelligent shapechanging blob of protoplasm, is 
banished from its own era to February 1954 before it is eventually
defeated by Superman.  [Superman #87]

853rd century
=======================
 An android 'Hourman' is constructed using the brain patterns of Rex Tyler.  [JLA #12]

2,000,000,000 A.D.
=======================
 Slam Bradley and Shorty Morgan take a time machine trip from January 1939.  [Detective Comics #23]



The following characters or events I need information or dates for:
 Mark Marson of the Interplanetary Police  [Tom Hickey]  [More Fun #15]
 Mr. America II & Liberty Lass change their names to Bloodtype & Death
Doll documented (as the vigilantes killed by Aztek) in Aztek: The Ultimate Man #1 (August 1996)