1912

1912 was notable 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 later remarked 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 Huitzilin 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)
 * Charlotte Pollard, companion to the Eighth and Sixth Doctors, was born. (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 DW: The War Machines, was born in Nairobi, Kenya.
 * 4 - Jack Le White (uncredited in DW: The Reign of Terror and DW: The Daleks' Master Plan) was born.

February

 * 13 - Jenny Laird (Neska in DW: Planet of the Spiders) was born.
 * 20 - Gerald Cross, who voiced a Megara in DW: The Stones of Blood, was born.
 * 28 - Mervyn Pinfield, a producer and director for Doctor Who, was born.

March

 * 14 - Hamilton Dyce (Scobie in DW: Spearhead from Space) was born.

April

 * 27 - Zohra Sehgal (Sheyrah in DW: The Crusade) was born. As of 2012, she is the oldest living Doctor Who actor.

May

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

June

 * 26 - John Bailey, who guested in several Doctor Who serials, was born.
 * 28 - Geoffrey Morris (Sabor in DW: Planet of the Spiders) was born.

July

 * 28 - Colin Douglas (Donald Bruce in DW: The Enemy of the World and Reuben in DW: Horror of Fang Rock) was born.

September

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

October

 * 9 - Seymour Green (Hargreaves in DW: The Seeds of Doom and the Chamberlain in DW The Twin Dilemma) was born.
 * 30 - Preston Lockwood (Dojjen in DW: Snakedance) was born.

Unknown date

 * Jack Cunningham (the jailer in DW: The Reign of Terror) was born.
 * John Gill (Oak in DW: Fury from the Deep) was born.
 * Reg Lye (Griffin in DW: The Enemy of the World) was born.