April 1: April Fools' Day; Iranian Islamic Republic Day (1979)Richard Plantagenet Campbell Temple-Nugent-Brydges-Chandos-Grenville, 3rd Duke of Buckingham and Chandos1871 The Duke of Buckingham (pictured) opened the first section of the Brill Tramway, a short railway line to transport goods between his lands and the national rail network.1952 Israel enacted a citizenship law, prior to which the country technically had no citizens.1969 The Hawker Siddeley Harrier, the first operational fighter aircraft with V/STOL capabilities, entered service with the Royal Air Force.2001 Same-sex marriage in the Netherlands was legalized, making it the first country to do so.Aimery of Cyprus (d.1205)Sophie Germain (b.1776)Shivakumara Swami (b.1907)Scott Joplin (d.1917)More anniversaries: March 31April 1April 2ArchiveBy emailList of days of the yearAbout