1912

1912 was significant as the year in which RMS Titanic sunk.

April

 * 10 April: the Titanic sailed on her maiden voyage from Southampton, England. The Daniels family, following a warning delivered by a friend known only as the Doctor, cancelled their plans to travel on the ship. A photograph of the Daniels and the Doctor later came into Clive Finch's possession. (DW: Rose) The Ninth Doctor would later remark that he was on board an 'unsinkable' vessel, likely the Titanic, but it is not known if he was referring to the events captured in Clive's photograph, an incident involving the Seventh Doctor or an event the Fourth Doctor made reference to. (DW: The End of the World, NA: The Left-Handed Hummingbird, DW: Robot)
 * 14 April: the Titanic struck an iceberg as it crossed the North Atlantic Ocean. As the ship sank, the Seventh Doctor stopped the Blue from acquiring the Xiuhcoatl. (NA: The Left-Handed Hummingbird)
 * 15 April:
 * The Titanic sank in the early hours of this date. Over fifteen hundred people died. The Fourth Doctor assured Borusa he "had nothing to do with it." (DW: The Invasion of Time) The sinking was a major event in 20th century Earth history, and nearly a century later, Max Capricorn built a space-faring replica which nearly met a similarly tragic end. (DW: Voyage of the Damned)
 * Birth of Charlotte Pollard, companion to the Eighth and Sixth Doctors. (BFA: Neverland)

Date Unknown

 * President Lecomte of Haiti was murdered by agents of Tancred Auguste. Auguste later moved Lecomte's body to the Presidential Palace and blew the building up to make it look as if Lecomte had perished in the explosion. Auguste seized power as president, but was himself soon assassinated. (NA: White Darkness)

January

 * 3 - William Mervyn, who played Sir Charles Summer in The War Machines, was born in Nairobi, Kenya.
 * 4 - Jack Le White was born.

February

 * 20 - Gerald Cross was born.

March

 * 14 - Hamilton Dyce was born.

April

 * 27 - Zohra Sehgal was born. As of 2011, she is the oldest living Doctor Who actor.

May

 * 4 - Peter Bathurst, who played Hensell in The Power of the Daleks and Chinn in The Claws of Axos, was born in Woking, Surrey, England.
 * 23 - Marius Goring was born.

June

 * 28 - Geoffrey Morris was born.

July

 * 28 - Colin Douglas was born.

September

 * 2 - Jim Tyson, who played one of the tourists on the Empire State Building in The Chase, was born.

October

 * 9 - Seymour Green was born.
 * 30 - Preston Lockwood was born.

Unknown date

 * Jack Cunningham, who played the jailer in The Reign of Terror, was born.
 * John Gill, who played the character of Oak in Fury from the Deep, was born.
 * Reg Lye was born.