feast
A very happy feast of (according to preference) Isaac of Woolsthorpe, or Jesus of Nazareth, to anyone reading this!
Also born on the same day of the year: Anwar Sadat, Humphrey Bogart, and (appropriately) Shane MacGowan of The Pogues (co-writer of the best-selling and very miserable “Fairytale of New York”).
Edited to add: oops, I screwed up and this didn't actually appear until 48 hours later than it was meant to. Er, happy new year then.