There are many official public holidays in South Korea. Korean New Year's Day, or "Seollal", is celebrated on the first day of the Korean lunar calendar. Korean Independence Day falls on 1 March, and commemorates the 1 March Movement of 1919. Memorial Day is celebrated on 6 June, and its purpose is to honor the men and women who died in South Korea's independence movement. Constitution Day is on 17 July, and it celebrates the promulgation of Constitution of the Republic of Korea. Liberation Day, on 15 August, celebrates Korea's liberation from the Empire of Japan in 1945. Every 15th day of the 8th lunar month, Koreans celebrate the Midautumn Festival, in which Koreans visit their ancestral hometowns and eat a variety of traditional Korean foods. On 1 October, Armed Forces day is celebrated, honoring the military forces of South Korea. 3 October is National Foundation Day. Hangul Day, on 9 October commemorates the invention of hangul, the native alphabet of the Korean language.