The King’s Official Birthday is celebrated in Tuvalu and the Pitcairn Islands on the second Saturday of June, marking a public holiday in these territories that recognize King Charles III as their ceremonial head of state. This tradition has its origins in the UK, where the birthday of the reigning monarch has been celebrated since 1748, originally on the actual birth date. The observance was moved to June by King Edward VII to take advantage of better weather. Tuvalu, an independent nation since 1978, and the Pitcairn Islands, a British Overseas Territory, both maintain this celebration as part of their connection to the Commonwealth. The Pitcairn Islands, known for their small population descended from HMS Bounty mutineers, also partake in the festivities, reflecting their historical ties to British governance.