|12 April 1986 – Cosmonautics Day.
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|Envelop Description||Cosmonautics Day (Den Kosmonavtiki) is an anniversary celebrated in Russia and some other former USSR countries on 12 April.
In 2011, 12 April was declared as the International Day of Human Space Flight in dedication of the first manned space flight made on 12 April 1961 by the 27-year-old Russian Soviet cosmonaut Yuri Gagarin. Gagarin circled the Earth for 1 hour and 48 minutes aboard the Vostok 1 spacecraft
|Type||Unused Illustrated Envelop|
|Published by/for:||Ministry of Communications, 1986|