Rassilon Era

The Rassilon Era referred to that part of the timeline during which the Time Lords ruled the planet Gallifrey and observed but seldom interfered with the flow of universal history. It presumably began with the ascendancy of Rassilon, founder of Time Lord society. It ended with the transportation of Gallifrey to a pocket universe at the conclusion of the Last Great Time War.

Gallifreyan civilisation existed far in the past of the 20th century time continuum. (PROSE: Goth Opera) Due to the nature of time travel the exact relation between the Rassilon and Humanian Eras, specifically whether they ran in succession or overlapped, is uncertain, although the TARDIS' navigational system differentiated between the two. (TV: Doctor Who)

By the Gregorian calendar, the Doctor's adventures on Gallifrey (up to the Time War) had lasted for 10,000,000 years by the year 2000000. (TV: The Trial of a Time Lord: The Ultimate Foe) However, the Rassilon Era had run since the Dark Times. (TV: The Infinite Quest)

Timeline

 * Year Zero - Rassilon activates the Eye of Harmony. (COMIC: The Final Chapter)
 * 10639.5 - Luther attempts to erase the history of the Time Lords. (COMIC: The Final Chapter)
 * 309906 - The Second Doctor was exiled to Earth. (AUDIO: Neverland)
 * 5725.3 - Time Lords established the Cult of Morbius. (AUDIO: Neverland)
 * 5892.9 - The Master stole information about the Doomsday Weapon from the Matrix. (AUDIO: Neverland)
 * 6241.1 - Chancellor Goth visited Tersurus, where he found the decrepit form of the Master. (AUDIO: Neverland)
 * 6776.7 - President Romana was captured and imprisoned by the Daleks on Etra Prime. (AUDIO: Neverland)
 * 6796.8 - Romana and the Sixth Doctor repelled an invasion of Gallifrey by the Daleks. (AUDIO: Neverland)
 * 6798.2 (Intersitital space) - A Dalek fleet was caught in a temporal paradox within the Time Vortex. (AUDIO: Neverland)
 * 6798.3 - Romana led a mission into the universe of anti-time (incorrectly recorded as 6978.3). (AUDIO: Neverland)
 * 6798.5 - The Eighth Doctor foiled the incursion of the forces of anti-time, but corrupted himself into Zagreus as a result. (AUDIO: Neverland)
 * 7101.02 - "relative date" recorded by the Master of his first encounter with the Third Doctor on Earth.