In 1891, Robert Louis Stevenson gifted “the rights and privileges” of his birthday (13th Nov) to 12 year old Annie Ide of Vermont, who was unlucky enough to be born on Christmas Day.
She left it in her will to her niece, who left it to her granddaughter. Written in faux Scots law legalese, if the “terms” are defaulted on, the birthday becomes the property of the current US president!