yearday

Etymology

Came into English via Middle English ȝereday, ȝerdai (“anniversary”), from Old English *ġēardæġ (compare Old English ġeārdagas (“days of yore”)), from Proto-West Germanic *jāradag (“day of the year, yearly day”), from Proto-Germanic *jēradagaz, equivalent to year + day. It is cognate with West Frisian jierdei (“birthday”), Dutch jaardag (“anniversary, birthday”), and German Jahrtag (“anniversary”).