In which month do British monarchs have their official birthday
Grand Duke's Official Birthday birthday. Because William I died between 24 April and 6 December, the holiday was celebrated twice in 1840. Under William III (1849–90), the date was set at 17 June until 1859, after which his birthday was celebrated on 19 February, two days after his actual birthday. With the separation of the orders of succession, the Dutch and Luxembourgish thrones split in 1890. The Nassau-Weilburg monarchs celebrated their official birthdays on their actual birthdays. In 1947, the day was declared the 'national holiday'. As both the then-reigning Charlotte and the heir apparent (and regent) Jean were born in January, it was
Queen's Official Birthday Queen's Official Birthday The Queen's Official Birthday, or the King's Official Birthday, is the selected day in some Commonwealth realms on which the birthday of the monarch (currently Elizabeth II) is officially celebrated in those countries. The sovereign's birthday was first officially marked in the United Kingdom in 1748, for King George II. Since then, the date of the king or queen's birthday has been determined throughout the British Empire, and later the Commonwealth of Nations, either by royal proclamations issued by the sovereign or governor or by statute laws passed by the local parliament. The date of the celebration