Not the 24th, but EASTER is always National Baked Ham with Pineapple Day.  Its a floating holiday.

Oddly enough, with yesterday in mind, Baked ham is often referred to as “picnic ham” because it is a quintessential picnic item.  Although, it’s not what I think of when I think of a picnic.  I don’t know who decided pineapples go well with ham, or when they decided it, but it is a very common topping for baked ham.

The tradition of having ham on Easter goes back to pre-biblical pagan traditions, where a pig was to be slaughtered on the first Sunday after the full moon (which is how the day of Easter is decided).  There is a long involved legend about the people of Babylon and a false god named Ishtar or Baal.  But essentially it is just another pagan tradition rewritten into the Catholic teachings.