The Golden Legend, which falls under the category of pious tradition, says that ALL of the following events happened on the 25th of March:
-Adam was created and fell into original sin
-Cain slew Abel
-Melchisedech made offering to God of bread and wine
-Abraham offered up his son Isaac
-Annunciation
-St. John Baptist was beheaded
-Christ Crucified
-St. James the Greater was beheaded by Herod
-St. Peter leaves prison
It’s a big day, no matter how you cut it.