Dec. 24th – Christmas Eve
Christmas Eve, which is the day before Christmas Day, is celebrated in many countries worldwide. It is a Christian observance that falls on December 24 in the Gregorian calendar. Christmas Eve has many of its own customs and traditions. The most widely practised one that still exists today is going to a Midnight Mass Church Service. In many countries, especially Catholic ones such as Spain, Mexico, Poland and Italy, this is the most important Church service of the Christmas season.