Saint Kitts and Nevis gains its independence.

Saint Kitts and Nevis, officially the Federation of Saint Kitts and Nevis, is an island country located in the Caribbean consisting of the two islands of Saint Kitts and Nevis, in the Leeward Islands chain of the Lesser Antilles. With 261 square kilometres (101 sq mi) of territory, and roughly 48,000 inhabitants, it is the smallest sovereign state in the Western Hemisphere, in both area and population, as well as the world's smallest sovereign federation. The country is a Commonwealth realm, with Charles III as king and head of state.

September 19 is the 262nd day of the year in the Gregorian calendar; 103 days remain until the end of the year.