Why do programmers confuse Christmas with Halloween?

Because OCT 31 is the same as DEC 25.

More dad jokes you'll groan at

What sounds like a sneeze and is made of leather? A shoe.What do you call an alligator in a vest? An investigator.Why does the golfer wear two pants? In case they get a hole in one What do you call a pencil with two erasers? Pointless.What does 'Rockin' Robin' do when she's bored? Tweet What do you call a moose with no name? Anonymoose.