When is yuris night ?

Yuri's Night is celebrated on April 12th, and is often called the 'World Space Party'. It commemorates the first man in space, Yuri Gagarin (April 12, 1961), and the lauch of the first space shuttle (April 12, 1981). #YurisNight celebrates the cosmos and all that humanity brings: music, art, science, culture, and above all each other. Yuri's Night was created in 2000 by Loretta Hidalgo Whitesides, George T. Whitesides and Trish Garner. Yuri's Night was first held on April 12, 2001 and has since greatly grown in popularity. Its now celebrated at over 567 events in 75 countries on seven continents.