March 20 2025 National Day Calendar. Nasa astronauts sunita williams, left, and butch wilmore stand together for a photo enroute to the launch pad at space launch. International day of happiness is a global event arranged by the united nations annually on march 20.

The calendar for the whole year, the calendar for march, lunar calendar, printable calendar. Nasa astronauts sunita williams, left, and butch wilmore stand together for a photo enroute to the launch pad at space launch.