It was on this day in 1968 when the Led Zeppelin played at the Roundhouse Chalk Farm in London and they promoted themselves as "Yardbirds, Now Known as Led Zeppelin" as this was one of the first gigs they played after dropping the name ‘The Yardbirds.' You can see from the flyer above and Instagram post below, more detail about the evening.
Coincidentally, Robert Plant celebrated his wedding the same day. Plant married Maureen Wilson on November 9th,1968. They would go on to have three children together; Carmen Jane (1968), Karac Pendragon (1972), and Logan Romero (1979).