It’s suposed to be why the first of April is called “April Fools”, since only “fools” would believe a conception without a human father happened on that day 🙂
(9 mo. before the Dec. 25 time)
Happy holiday(s) for me for all of these days, except those who follow the spagetti monster. They get a Happy Pirate’s day, an “Ahoy!”, or an “Arrgh!”.