Cosmonautics Day Space Exploration USSR GagarinOriginal vintage Soviet advertising poster promoting Cosmonautics Day on 12 April the anniversary of the first manned space flight on 12 April 1961 by the pilot and cosmonaut Yuri Gagarin (Yuri Alekseyevich Gagarin; 1934 1968), now commemorated by the United Nations as the International Day of Human Space Flight featuring a colourful stylised design of a cosmonaut astronaut in a space suit in shades of red on the dark blue space background with pink