In Brazil, Dec 24th is not a state holiday... but it's customary to give employees half a day off so they can go home after noon and spend the afternoon preparing to celebrate Christmas eve with the family. Dec 25th is a proper holiday.
I recently moved to the Netherlands, and was surprised to find out that here Dec 24th is a normal working day, but Dec 26th is a holiday ("the second day of Christmas," as it's called).