Maria Grazia Treccanchi, from Sicily, was celebrating her 50th birthday.
Andrew Morton, Tina Brown, and Ashley Walton on the prince's 60th birthday.
So the family threw her a 100th birthday party, then she entered her swift decline.
late 14c., from Old English byrddæg, "anniversary celebration of someone's birth" (at first usually a king or saint); see birth (n.) + day. Meaning "day on which one is born" is from 1570s. Birthnight is attested from 1620s.