Young Justice‘s screen timestamps set the show apart from other animated series which often only have a loose sense of the passage of time. Every new episode or major scene transition is accompanied by an on-screen time stamp which gives the time and location of that scene. This page lists those timestamps (days rather than hours) and the events they pertain to.

Note: No year is given in time stamps (presumably to stop the show dating), but we can assume that the first season starts in “Year Zero”. I’ve also noted the dates mentioned in interviews and on official websites for events that took place a certain number of years Before Young Justice (BYJ).

• BYJ 135 - The Martian Manhunter born on Mars (Ask Greg)
• BYJ 106 (c1905) – Kent Nelson (Doctor Fate is born, “Denial”)
• BYJ 65 (c1946) – Kent Nelson puts aside the Helmet of Fate and retires as Doctor Fate (“Denial”)
• BYJ 48 – Miss Martian born on Mars (Ask Greg)
• BYJ 40 – Zatara born (Ask Greg 09/02/11).
• BYJ 35 – Barry Allen born (Ask Greg 25/02/11)
• BYJ 33 – Clark Kent/Kal-El born (Ask Greg 25/02/11)
• BYJ 32 – Bruce Wayne born (Ask Greg 25/02/11)
• BYJ 16 – Kaldur’ahm born (Cartoon Network website gives Aqualad’s age as 16)
• BYJ 15 – Wally West born (Cartoon Network website gives Kid Flash’s age as 15)
• BYJ 13 – Dick Grayson born (Cartoon Network website gives Robin’s age as 13)
• BYJ 10 – Superman appears in Metropolis for the first time (mentioned in multiple pre-launch interviews).
• BYJ 4 – The 9-year-old Dick Grayson begins working for the Batman (Greg Weisman’s comment at the 2010 SDCC panel)
• BYJ 3 – Speedy begins his career (Ask Greg 09/02/11).
• BYJ 2 – Aqualad, Kid Flash begin their careers (Ask Greg 09/02/11).

March

• Early March - Cadmus Labs begins growing their Superboy clone (16-weeks before “Independence Day”)

June

• 19th - The Cult of Kobra seizes control of the Venom factory on Santa Prisca. Bane is forced to fight Mammoth, the first Kobra Venom test subject. (“Drop-Zone”)

July

• 4th - “Today’s the day!” Robin, Aqualad, Kid Flash and Speedy are to be inducted into the Justice League, but discover that it’s just a publicity stunt and they are not yet considered full members. Speedy storms off in protest. The other teens try to prove themselves by infiltrating Cadmus Labs. They discover and liberate a teenage clone of Superman called Superboy. The Lab’s director, Mark Desmond uses his Blockbuster formula to transform himself into a monster which the teens eventually defeat (“Independence Day” and “Fireworks”). Batman tells the teens that he’ll tell them his decision of what to do with them in three-days time (Young Justice (vol. 2) #0 (March 2011)).
• 5th - Kid Flash suggests that Superboy stays with him and his parents while they await Batman’s decision. Aquaman tells Aqualad he agrees with his argument for keeping the team of sidekick’s together (Young Justice (vol. 2) #0 (March 2011))
• 7th – Kid Flash and Aqualad run into the Terror Twins at Central City Mall bringing the attention of the Flash and Superman.(Young Justice (vol. 2) #0 (March 2011))
• 8th - Batman announces that Robin, Aqualad, Kid Flash and Miss Martian (the Martian Manhunter’s niece) will form a new covert unit working for him and the Justice League. Their supervisor will be the Red Tornado, Black Canary will train them, but Batman reserves the right to dispatch them on missions (“Fireworks”; Young Justice (vol. 2) #0 (March 2011)). Superboy and Miss Martian move into the Cave (Young Justice (vol. 2) #1 (April 2011)). A lonely G-Gnome sneaks into Mount Justice and is found by Superboy (Young Justice (vol. 2) #2 (May 2011)).
• 17th - Robin, Aqualad, and Kid Flash try to talk to Speedy as he busts gun-runners led by Brick, but he tells them that he wants nothing to do with their new group. (“Welcome to Happy Harbor”)
• 18th - Professor Ivo and Brom Stik’s Mister Twister android tracks the Red Tornado in Happy Harbour, but it’s destroyed by Young Justice. Miss Martian has difficulty associating with the other teens, but is accepted into their circle after she deduces the Twister android’s true purpose. (“Welcome to Happy Harbor”)
• 22nd - Batman notes the disappearance of Venom from the black market and dispatches Young Justice to investigate Santa Prisca. They discover the Cult of Kobra in conflict with Bane’s fighters. Kobra is discovered to be producing Kobra Venom, a new variant that mixes Venom and the Blockbuster formula. All stockpiles are believed destroyed, but the Sportsman manages to salvage a single vile for the Light. Young Justice select Aqualad to be their leader (“Drop-Zone”).
• 23rd - Batman debriefs Young Justice on their Santa Prisca mission and compliments them on the results (“Drop-Zone”)
• 24th (about) - Sterling Roquette kidnapped from Star City (two weeks before “Infiltrator”).
• 27th – Kent Nelson is abducted by Abra Kadabra (“Denial”).

August

• 3rd – Professor Ivo’s Amazo android is defeated by the Justice League after a four-hour battle. Young Justice are assigned to protect its components as they are shipped to STAR Labs in Manhattan and Boston, but they are stolen by Ivo’s MONKI robots. Robin and Superman collaborate to stop Amazo after realising that it can only duplicate one power at a time (“Schooled”).
• 7th - Red Arrow (the former Speedy) rescues Sterling Roquette from the League of Shadow (“Infiltrator”).
• 8th – Artemis, Green Arrow’s new sidekick, joins Young Justice. Young Justice are left to protect Sterling Roquette from the League of Shadows while she finished a computer virus to defeat their super-weapon (“Infiltrator”).
• 9th - Red Arrow warns Artemis that he knows that Batman and Green Arrow have lied to Young Justice about her identity (“Infiltrator”).
• 19th – The Red Tornado ‘s concern for Kent Nelson’s disappearance leads Young Justice to investigate the Tower of Fate and unwittingly reveal its location to Klarion and Abra Kadabra. Wally West has to confront his disbelief in magic and briefly assume the mantle of Doctor Fate to defeat Klarion. Nelson’s body dies in the encounter, but his soul continues to reside in the Helmet (“Denial”).
• 20th – Wally takes the Helmet of Fate back to Mount Justice for safe keeping (“Denial”).
• 27th – Jay Garrick’s birthday. After a disastrous mission Aqualad returns to Atlantis to reconsider his future, but discovers that the girl, Tula, he had gone back for is now involved with his friend Garth. Aquaman and Mera announce that Mera is pregnant. The Atlantean Science Center is destroyed in an attempt by Black Manta to steal a giant frozen starfish (“Downtime”).

September

• 3rd – Aqualad rejoins Young Justice (“Downtime”). The Light’s unseen partner trails a teleportation gate way as a method of delivering new technology to them (“”). Batman reports that the Watchtower has detected an unusual energy signature in the Bialyan Desert (“Downtime”, “”).
• 4th – Young Justice investigate the Bialyan Desert, but are intercepted by the telepath Psimon who suppresses their recent memories. They spend two days wandering around before regaining them memories (“”).
• 5th – The team leave the Bialyan desert with the Sphere, the Light’s weapon which appears to have adopted Superboy (“”)

• The Joker tricks Snapper Carr into revealing the location of the Justice League’s headquarters (Young Justice (vol. 2) #2 (May 2011)).