Denmark's King Frederik X, third left, celebrating his 56th birthday, waves together with Queen Mary, center, Crown Prince Christian, third right, Queen Margrethe, second right, Princess Josephine, second left, Princess Isabella, right, and Prince Vincent from the balcony of Frederik VIII's Palace, Amalienborg Castle in Copenhagen, Sunday, May 26, 2024. (Ida Marie Odgaard/Ritzau Scanpix via AP)