FILE - Britain's Queen Elizabeth II watches the red arrows fly over to mark her official birthday at Windsor Castle, Windsor, England, Saturday June 12, 2021. Elizabeth was born on April 21, 1926, but it was sometimes confusing for the public to know when to celebrate. There was no universally fixed day for her “official birthday”: It’s either the first, second or third Saturday in June, and was decided by the government. (Chris Jackson/Pool via AP, File)