Christmas is celebrated on the 24th of December in many countries around the world, including Norway, Sweden, Finland, Iceland, and Denmark. These countries celebrate the arrival of Santa Claus and his reindeer on the evening of the 24th. The celebrations typically involve decorating a Christmas tree, singing carols, eating traditional foods, and exchanging gifts. The festivities often continue through the night and into the early morning hours, when Santa Claus is expected to arrive and deliver presents to all the good children.