Gospel Day is observed in Kosrae, a state in the Federated States of Micronesia, on August 21 every year. This holiday commemorates the introduction of Christianity to the island, which began with the arrival of Protestant missionaries in 1852. The missionaries played a crucial role in transforming the island's social and political structures, as they introduced a new system of civil government and led to the establishment of a council that replaced the traditional paramount chief with a Christian chief. Today, approximately 95% of Kosrae's population identifies as Protestant, reflecting the lasting impact of these early missionaries. Gospel Day is marked by special church services and various community events, emphasizing the significance of Christianity in the culture of Kosrae. While it is an official holiday in Kosrae, it is not celebrated in the other three states of the Federated States of Micronesia.