The International Day of Human Space Flight is observed globally on April 12 every year. The UN General Assembly passed a resolution on April 7, 2011, had declared April 12 to be celebrated as International Day of Human Space Flight.
History of the day:
On 12 April 1961, was the date of the 1st human space flight was carried out by Yuri Gagarin, a Soviet citizen, who became the first person to journey into outer space. This historic incident opened the way for space exploration for the benefit of all mankind. 12 April was also the date of the 1st Space Shuttle STS-1 of Columbia launched in 1981, which is also commemorated on this date.