2000

The year 2000 was, as evidenced by statements by American news outlets and world-renowned chronologist Professor Wagg — the start of the third millennium. (TV: Doctor Who) This view was shared by at least one incarnation of the Doctor. (PROSE: Doctor Who - The Novel of the Film) Despite the predilection of most humans to celebrate it as the beginning of the millennium, however, at least one other incarnation of the Doctor regarded it as the final year of the second millennium. (PROSE: Millennial Rites) This tug-of-war between the technical and common conceptions of the year was reflected in an argument between Anji Kapoor and her boyfriend Dave Young. He held fast to the view that 1 January 2001 was the beginning of the millennium, whereas she found this pedantry a reason to seriously consider leaving him. (PROSE: Escape Velocity)
 * 1 January - The Eighth Doctor departed San Francisco, California after preventing from destroying the planet at the start of the year in San Fran's time zone (UTC/GMT-8h). Grace Holloway declined an invitation to travel with him. (TV: Doctor Who)
 * 10 February - Henry Louis Noone was born in St. Stephen's Hospital in London. (AUDIO: A Death in the Family)

Spring

 * The Fourth Doctor and Romana visited Paris (COMIC: The Forgotten), much to Romana's chagrin as they had only just visited the city, albeit twenty-one years earlier. (TV: City of Death)
 * 25 December - 360 days prior to this date, the Eighth Doctor warned Chang Lee not to be in San Francisco for Christmas 2000, suggesting knowledge of an unknown incident that would take place in San Francisco at this time. The Doctor recommended Chang Lee to "take a vacation" on this date, but it's not known if Chang followed his advice. (TV: Doctor Who)

Unknown dates

 * The Hourly Telepress published adventures of the Karkus. (TV: The Mind Robber, PROSE: The Wheel of Ice)
 * Some time after the departure of the Eighth Doctor, Grace Holloway discovered residue left over from her encounter with . Seeking to develop a human/Time Lord hybrid capable of regeneration, she began working for a genetics lab; later she learned she was actually working for a branch of MI6. (COMIC: The Glorious Dead)
 * One account claimed that it was during the year 2000 that the First Doctor regenerated, rather than 1986. (PROSE: Doctor Who and the Tenth Planet)
 * Chloe Webber was born to Trish Webber and an unnamed father. (TV: Fear Her)
 * Sally Morgan was born. (AUDIO: Project: Nirvana)

References in the Doctor Who universe tend to indicate the year 2000 was the start of the millennium, rather than 2001, the technical start of that millennium.