Yuri's Night or Cosmonautics Day in Russia
Yuri's Night or Cosmonautics Day in Russia is held on April 12. Commemoration of first human in space by Yuri Gagarin. International observance. This event in the second decade of the month April is annual. 
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Cosmonautics Day is observed annually on April 12 in Russia and other former Soviet Union nations. This holiday commemorates the first crewed space flight on April 12, 1961, with Russian Soviet cosmonaut Yuri Gagarin on board.
The Vostok spacecraft was designed to eject the cosmonaut at approximately 7 km and allow him to return to earth by parachute.
The first animal to make an orbital spaceflight around the Earth was the dog Laika, aboard the Soviet spacecraft Sputnik 2 on 3 November 1957.
Similar holidays and events, festivals and interesting facts
Day of formation of the duty units of the Ministry of Internal Affairs of Russia on March 28;
Day of Mologa on April 14 (Yaroslavl Oblast, Russia);
Chief Accountant Day in Russia on April 21
Days of protection from environmental hazards in Russia on April 22
Cactus Grower Day in Russia on April 23
Day of the Republic of Yakutia on April 27
Physicist Day on May 7 (since 1959)
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