International Olympic Day is a day commemorating the day on which the International Olympics Committee (IOC) was formed. First started in 1948 on the 52nd anniversary of the formation of the IOC, it is now celebrated worldwide on June 23 every year. Usually, Olympic Day celebration involves sporting and cultural events organised by National Olympic Committees of each nation. The Olympic Day run is one of the main events of the day that sees participation from 150 countries across the world. Check out our slide covering details about International Olympic Day, what is it, when did it start and how is it celebrated.