Universal Century

The Universal Century timeline (宇宙世紀, Uchū Seiki, often shortened to UC) is the first featured in the Gundam franchise, being host of the most on-screen material seen across the series compared to other timelines. Major series and movies set during the Universal Century include the original Mobile Suit Gundam, its sequels Zeta Gundam and Gundam ZZ, the movies Char's Counterattack and Gundam F91, and the currently last main series anime set in the timeline Victory Gundam. Original video animations and other related materials make up the bulk of modern works set during the Universal Century, with most main anime series being set in alternate timelines with their own history and settings.

The UC calendar began when humanity first started expanding beyond Earth in the form of space colonies.

Canon
Note: in chronological order with only animated and/or live action works. Bold entries mean they are main series anime.
 * 0068 - 0079 - Mobile Suit Gundam: The Origin - OVA/Movie series set before Gundam 0079. Offers an alternate retelling of events that falls more in order with the story of the Gundam The Origin manga of the same name than that of Gundam 0079. It was broadcast on television as Gundam The Origin: Advent of the Red Comet.
 * 0079 - Mobile Suit Gundam - 43 episode anime series; the first entry of the franchise. Primarily set during the ending months of the One Year War. In modern times, the original series is referred to as Gundam 0079.
 * Gundam I - first movie in compilation trilogy for Gundam 0079.
 * Gundam II: Soldiers of Sorrow - second movie in compilation trilogy for Gundam 0079.
 * Gundam III: Encounters in Space - third movie in compilation trilogy for Gundam 0079.
 * 0079 - Mobile Suit Gundam MS IGLOO - 3 episode OVA series set throughout the One Year War.
 * 0079 - Mobile Suit Gundam Thunderbolt - 8 episode ONA series. It is an adaptation of the 2012 manga of the same name.
 * December Sky - First compilation film for Gundam Thunderbolt; summarizes the first season.
 * Bandit Flower - Second compilation film for Gundam Thunderbolt; summarizes the second season.
 * 0079 - Mobile Suit Gundam: The 08th MS Team - 12 episode OVA series.
 * Miller's Report - Compilation film set between the events of The 08th MS Team.
 * 0079 - 0080 - Mobile Suit Gundam 0080: War in the Pocket - 6 episode OVA series.
 * 0083 - Mobile Suit Gundam 0083: Stardust Memory - 13 episode OVA series set between the events of Gundam 0079 and Zeta Gundam.
 * 0087 - 0088 - Mobile Suit Zeta Gundam - 50 episode anime series; the second entry of the franchise and sequel to Gundam 0079. Primarily depicts the events of the Gryps Conflict.
 * A New Translation I: Heirs to the Stars - First compilation film in the A New Translation trilogy for Zeta Gundam.
 * A New Translation II: Lovers - Second compilation film in the A New Translation trilogy for Zeta Gundam.
 * A New Translation III: Love is the Pulse of the Stars - Third compilation film in the A New Translation trilogy for Zeta Gundam.
 * 0088 - 0089 - Mobile Suit Gundam ZZ (Pronounced as Double Zeta) - 47 episode anime series; the third entry of the franchise and direct sequel to Zeta Gundam. Primarily depicts the events of the First Neo-Zeon Conflict.
 * 0093 - Mobile Suit Gundam: Char's Counterattack - movie which acts as a sequel and finale to all of Gundam 0079, Zeta Gundam, and Gundam ZZ, as well as a standalone film. Primarily depicts the events of the Second Neo-Zeon Conflict.
 * 0096 - Mobile Suit Gundam Unicorn - 7 episode OVA series. Primarily depicts the events after the Second Neo-Zeon Conflict and the Laplace Incident. It is an adaptation of the 2006 light novel series of the same name. It was broadcast on television as Mobile Suit Gundam Unicorn RE:0096.
 * 0096 - Mobile Suit Gundam Twilight Axis - 6 ONA series set after the events of Gundam Unicorn.
 * 0097 - Mobile Suit Gundam Narrative - movie set one year after the events of Gundam Unicorn. Primarily depicts the events revolving around the capture mission of RX-0 Unicorn Gundam 03 "Phenox". Adapts the last book of the Gundam Unicorn light novel series.
 * 0105 - Mobile Suit Gundam: Hathaway's Flash - Upcoming movie based on the novel series of the same name.
 * 0123 - Mobile Suit Gundam F91 - movie set during the late era of the Universal Century. Originally meant to be a mainline anime series, the project was rebranded as a feature-length film, theoretically acting as a compilation of the finished 13 episodes of the series. Primarily depicts the events surrounding the rise of the Crossbone Vanguard.
 * 0153 - Mobile Suit Victory Gundam - 51 episode anime series; the fourth entry of the franchise and currently the last mainline series set in the Universal Century. Primarily depicts the events surrounding the rise of the Zanscare Empire.