“On the 173rd day of each year, he always made a point of eating eggs.”
Cordwainer Smith, “The Ballad of Lost C’Mell.”
I don’t do religious holidays, and I especially hate Xmas. I was torn between Independence Day (one of the three holidays I do care about) and the “last day of work” option, but then realised that the first day of the actual vacation is much better than the last day of work. So I picked Independence Day.