Margaret Thatcher Day is observed in the Falkland Islands on January 10 each year. This holiday commemorates Prime Minister Margaret Thatcher's first visit to the islands on January 10, 1983, following the British victory in the Falklands War, which concluded on June 14, 1982. The day recognizes Thatcher's contribution to the successful retaking of the islands after Argentine forces invaded them in April 1982. The Falkland Islands, a British overseas territory, have a complex history involving claims from Argentina, Britain, France, and Spain. The holiday has been celebrated since 1992 and serves as a reminder of the islands' determination to remain British.