Chuuk Liberation Day is observed in the Federated States of Micronesia, specifically in the state of Chuuk, on September 23 each year. This day commemorates the liberation of Chuuk from Japanese occupation, which officially occurred on September 23, 1945, following World War II. The state of Chuuk, formerly known as Truk, consists of several island groups, with Chuuk Lagoon being the most populated area. Unlike other states such as Kosrae and Pohnpei, celebrations in Chuuk are relatively modest, lacking large ceremonies or parades. However, it is recognized as a public holiday, leading to the closure of schools, banks, and government offices. The historical significance of the day is rooted in the U.S. Navy's strategic attacks on Truk Lagoon during the war, which played a crucial role in isolating Japanese forces in the region.