Explanation:

International Day of Human Space Flight is observed on April 12th each year to commemorate the first human space flight by Yuri Gagarin on April 12, 1961. Established by the United Nations in 2011, this day celebrates the achievements of space exploration and recognizes the contributions of astronauts and cosmonauts to advancing scientific knowledge and international cooperation in space. International Day of Human Space Flight promotes space exploration as a driver of technological innovation, scientific discovery, and peaceful cooperation among nations. It underscores the potential of space exploration to address global challenges and inspire future generations to explore new frontiers in science and space discovery.