Currently it looks like this
- Ancient Greece - Altuum and his forces cleared Themyscira before the Amazons relocate
- Doom's Doorway was built
- Unknown time - Diana and Grail were born as a baby - Nubia was reborn as an adult
- About 500 years ago - Near the time of The Crusade - Birth of The Demon
- 1938 or so - Alan Scott became Green Lantern
- 1940s - JSA era - Ollie and Roy time traveled and joined All Star Squadron
- Bruce and Minkhoa Khan trained and travel together
- Batman Year One
- Dick became Robin
- 14 years ago Damian was born, then as back up Ra's created Respawn
- (Talia and Ra's are involved in Damian's upbringing, he did not just met her when he turned 8)
- Dick, Kara, and Billy Batson get involved in Batman and Superman's adventures
- Dick was fired from Robin
- The destruction of Xanshi
- Slade manipulated Terra to get revenge on Teen Titans
- Barry died (Kara's status unknown)
- Nightwing visited Robin Jason
- The Killing Joke
- A Death in The Family - A Lonely Place of Dying
- Hippolyta killed Echidna during Challenge of The Gods
- Knightfall - Emerald Eclipse - New Dawn
- Tim, Cassie, Bart and Kon formed Young Justice - Dick moved to Bludhaven
- No Man's Land - Sarah Essen was killed (Helena's status unclear)
- Dick bought his Bludhaven apartment building
- Dick quits the BPD because there's too much corruption - Blockbuster never discovered his identity
- Jason returned as Red Hood
- Conner died in Infinite Crisis but Slade didn't Chemo Bludhaven (possibly because he's the one who asked Dick to teach Rose so she won't turn out like him)
- Grant Morrison Batman saga - Geoff Johns Green Lantern saga - Batwoman debut
- Final Crisis - The Return of Bruce Wayne - Flash Rebirth - Batman Incorporated
- Roy thought Lian died - Lian was rescued by Cheshire
- Flashpoint
What's unclear
1. When Death of Superman happened
Jon was born 12 years ago, after Lois and Clark married, after Death of Superman, but Dick remembered Tim was already Robin at the time, which would make Tim 26 years old now, and it also doesn't match Dick and Billy's approximate age difference between World's Finest and today.
2. Kara's age
3. Diana, clay or daughter of Zeus. Both have been referenced.
4. Justice League origin. According to Clayface, people can't agree on how they're formed. The Hall of Justice feature every version.
5. Steph being Robin and Batgirl, also Cass, though I haven't kept up with Batgirl, so afaik Steph Robin was only mentioned in Robins, which is in "whatever you like" continuity
6. Young Justice generation's age
7. Anything else that hasn't been mentioned/referenced in post Infinite Frontier stories
Current character's age
Damian's 14
Jon's 17 going on 18
Jaime's graduating high school