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: 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)

According to one account, Zoe Heriot originated from 2000. (AUDIO: Prison in Space) Despite the fact that most sources date Zoe's life to a much later time, no source disputes that she was a fan of the Karkus comics published in the Hourly Telepress in this year. (TV: The Mind Robber, PROSE: The Wheel of Ice)

People in 1966 initially believed the rhinoceros, an endangered species, would be completely extinct by this year. (PROSE: The Rhino of Twenty-Three Strand Street)

January - February
For the first ten minutes of 1 January, London was transformed into the Great Kingdom. Anne Travers sacrificed her life to return the universe to normal. (PROSE: Millennial Rites) The Sixth Doctor regenerated shortly after leaving Earth. (PROSE: Head Games)

Also in the morning of 1 January, the Eighth Doctor departed San Francisco after preventing from destroying the planet at the start of the year. Grace Holloway declined an invitation to travel with him and the Doctor did not agree to Grace's invitation for him to come with her. (TV: Doctor Who) After the departure of the Eighth Doctor, Grace Holloway discovered residue left over from the Master's Deathworm Morphant form. (COMIC: The Fallen)

The Fourth Doctor and Romana II were also on Earth on the 1st of January; visiting Paris, much to Romana's chagrin as they had only just visited the city, albeit twenty-one years earlier. (COMIC: The Forgotten)

The Thirteenth Doctor and Team TARDIS were also on Earth on the 1 January, enjoying the New Year's celebrations at Sydney Harbour Bridge, as part of their tour of various New Year's celebrations in history. Ryan Sinclair cited this particular New Year as being his favourite. (TV: Resolution)

In February, the Eighth Doctor returned to Grace Holloway and offered her a trip in the TARDIS. This time, she accepted his offer. (COMIC: The Body Politic) Sometime after the Doctor returned her to Earth, Grace quit her job at the hospital and, seeking to use the Master's DNA to develop a human/Time Lord hybrid capable of regeneration, began working for a genetics lab; which she later learned was actually a branch of MI6. (COMIC: The Fallen)

On 10 February, Henry Louis Noone was born in St Stephen's Hospital in London. (AUDIO: A Death in the Family)

November - December
In early November, Tom wandered onto Iris Wildthyme's Celestial Omnibus thinking it was a real bus. Iris left London with Tom on the bus and the two began travelling together. (PROSE: Verdigris)

Prior to Christmas 2000, the Eighth Doctor warned Chang Lee not to be in San Francisco on that date and advised him to "take a vacation". (TV: Doctor Who)

Undated events
The Cybermen unleashed a computer virus that destroyed all of the vowels. (PROSE: Vrs)

Chloe Webber was born to Trish Webber and Chloe's father. (TV: Fear Her)

Sally Morgan was born. (AUDIO: Project: Nirvana)

The Sixth Doctor met Evelyn Smythe for the first time in Sheffield Hallam University. (AUDIO: The Marian Conspiracy)

New York City's total population was 8,008,278, 2,871,032 of whom were foreign-born. (TV: The Gathering)

The London Eye was opened sometime in this year. (PROSE: Magic of the Angels)

Other realities
In an alternate universe, the Eighth Doctor stayed in San Francisco after defeating and married Grace Holloway. He got a job as a professor at a university in San Francisco and happily lived a domestic life with Grace. (COMIC: The Glorious Dead)

In another universe, the Doctor came to London to hide from the Time Lords and avoid his trial. To improve his elusiveness, he jumped off a pylon and regenerated into a woman. For a while, the Doctor managed to live an ordinary life on Earth working at a Sainsbury's, but she was eventually found by two Time Lords and punished for her actions. (AUDIO: Exile)

Behind the scenes

 * 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 century.
 * Doctor Who and the Tenth Planet directly contradicts The Tenth Planet, the television story the novelisation is adapted from. The 1976 novelisation considers the First Doctor's regeneration having taken place in 2000, rather the 1986 placement the 1966 television story gave.