101 significant historical events occurred on April 1. April 1 has been the date of 40 recorded historical events over more than a century. Notable events on this day include the cycling competitions at the 1896 Summer Olympics at the Neo Phaliron Velodrome, the tragic Adana massacre of Armenian Christians in 1909, and the beginning of Ireland's Easter Rising in 1916. This date is also associated with major disasters such as the Titanic sinking and sporting milestones like ice hockey at the 1920 Summer Olympics.
17 famous birthdays on April 1
Including Claude Cohen-Tannoudji, Richard Zsigmondy, Joseph E. Murray
Event Distribution by Century
Darker = Higher Density0th Century
1 event7th Century
4 events9th Century
1 event12th Century
1 event13th Century
4 events14th Century
2 events16th Century
8 events18th Century
1 event19th Century
13 eventsCycling at the 1896 Summer Olympics — six cycling events were contested at the Neo Phaliron Velodrome
20th Century
38 events1911 battle between the supporters of Francisco Madero and federal troops of Porfirio Díaz in the initial phase of the Mexican Revolution
Sinking of the RMS Titanic — maritime disaster in the North Atlantic Ocean on the night of 14–15 April 1912
Ice hockey at the 1920 Summer Olympics — overview of the ice hockey played during the 1920 Olympic Games
Figure skating at the 1920 Summer Olympics — 1920 edition of the figure skating competitions during the Olympic Games
1936–1939 Arab revolt in Palestine — nationalist uprising by Palestinian Arabs in Mandatory Palestine
Bataan Death March — forced transfer of American and Filipino prisoners of war by the Imperial Japanese Army in 1942
Battle of Bombo was fought in April 1979 at the town of Bombo, Uganda, between Tanzanian forces and Ugandan troops
1990 United States Census — determined the resident population of the United States on 1 April 1990
2000 United States Census — 22nd census, which determined the resident population of the United States on April 1, 2000
21st Century
28 events2020 United States Census — 24th national census of the United States, taken on April 1, 2020
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