1914

June

 * 28 - The assassination of Archduke Franz Ferdinand of Austria-Hungary triggers a series of events that rapidly escalate into Earth's first global conflict, World War I. Unknown to the general populace, however, the start of the war was in fact influenced by Nemesis (DW: Silver Nemesis). Active warfare would continue until November 1918, with a formal peace treaty ending the war being signed on June 28, 1919, the fifth anniversary of the assassination.

Unknown dates

 * Part of "The Amateur" takes place.
 * Charlie Chaplin begins his film career in Hollywood; nearly a century later, Donna Noble expresses a desire to visit him with the Doctor. (DW: Journey's End)
 * The events of Human Nature takes place. This refers to the original novel only.
 * the Tenth Doctor visits the battlefields of the First World War in Belgium twice, once with Rose Tyler and once with Daniel Francis Thompson. (DWAM: Warfreekz! and Deep and Dreamless Sleep)

June

 * 26 - John Bailey, who played the Commander in "The Sensorites," Edward Waterfield in "The Evil of the Daleks," and Sezom in "The Horns of Nimon," is born at New Cross, London.

November

 * 23 - Roger Avon, who played Saphadin in "The Crusade" and Daxtar in "The Daleks' Master Plan," as well as Wells in "Daleks - Invasion Earth 2150 AD," is born in Jarrow, England.

December

 * Dudley Jones, who played John Dyson in "The Tenth Planet," is born in Watford, England.

Unknown date

 * Robert Lankesheer, who played the Chamberlain in "The Crusade," is born in Wales.