Timeline

This is a timeline of canon events in the Adventure Time series.

Distant past

 * According to the Lich, before the universe existed, "there were monsters".
 * Millennia ago, Orgalorg the warlord was banished by Grob Gob Glob Grod to Earth for attempting to intercept a yellow Catalyst Comet to gain its power. He is transformed into a penguin.
 * On Earth during the Cretaceous period, four Elementals -- Urgence Evergreen, Chatsberry, Balthus, and Slimy D -- attempt to stop a green Catalyst Comet from hitting Earth, but fail. The Ice Crown is created during their attempt.

Up to the Mushroom War

 * Human civilization takes over the Earth.
 * Simon Petrikov is born.
 * Simon discovers a crown in Scandinavia, and is influenced by its powers.
 * 996 years before the present day - the Mushroom War takes place.

Post-Mushroom War to the present day

 * Simon Petrikov adopts a half-vampire girl, Marceline, and raises her.
 * Two Bread Tom leads a tribe of surviving humans into a freighter.
 * A blue Catalyst Comet hits Earth.
 * 300+ years before the present day - Shoko and her tiger.
 * Finn is born.
 * Martin pilots a spaceship and is about to crash into Mars, but Grob Gob Glob Grod diverts it (and is killed) towards Earth, mistaking it for another blue Catalyst Comet.

Present day

 * Orgalorg emerges from Gunter attempts to swallow the current purple Catalyst Comet to gain its powers, but is defeated. Martin accepts its offer and disappears from the universe.

Future events

 * 1000 years after the present day - An alien, Cuber, uses the Graybles to navigate across the ruined Earth. He later recounts his adventures.

Farmworld Timeline

 * Simon Petrikov uses the powers of his Ice Crown to stop the Mushroom Room from detonating, and he dies as he gets crushed by the bomb's weight.
 * The enraged Ice Crown unleashes an ice age upon the Earth, but humanity thrives in a less advanced state for 600 years.
 * Farmworld Finn discovers the Ice Crown.