1 February

On 1 February 1851, Mary Shelley, a former companion of the Eighth Doctor, died. (PROSE: Managra)

In 1918, 1 February was the first date skipped in Russia's transition from the Julian to Gregorian calendars. Cousin Anastasia incorporated it into the Thirteen-Day Republic. (PROSE: The Book of the War)

In 1967, Jackie Tyler and her Pete's World counterpart were born. Cuba Gooding, Jr. shared the same birthday. (TV: Rise of the Cybermen)

On Jackie's 40th birthday in 2007, the Doctor's TARDIS fell into Pete's World, where it nearly died. With twenty-four hours before the TARDIS could return to its home universe, Rose Tyler discovered a living version of her dad, Pete Tyler, alive and a successful businessman. To meet her "father," Rose sneaked, with the Tenth Doctor, into Jackie Tyler's, her mother, birthday party. The President of Great Britain forbade the use of John Lumic's new cybernetic lifeform, but Lumic ignored him. Mickey Smith, mistaken for his parallel self, Ricky Smith, was taken by the Preachers, who fought Lumic. The cybernetic life, dubbed Cybermen, attacked Jackie's party, killing most of those inside, including the President. (TV: Rise of the Cybermen)