Three theories about how April Fools' Day startedTo play this video you need to enable JavaScript in your browser.This video can not be playedThree theories about how April Fools' Day startedCloseMore stories about April Fools' Day.SectionNewsPublished1 AprilShareclose panelShare pageCopy linkAbout sharingRelated topicsApril Fools' DayFollow April Fools' Dayclose panelYou are now following April Fools' DayUpdates from your News topics will appear in My News and in a collection on the News homepage.Read description