Christmas Eve (Christianity) and its related observances: Juleaften (Denmark)/Julaften (Norway)/Julafton (Sweden)

Jul, the Danish Jule and Christmas, is celebrated throughout December starting either at the beginning of Advent or on 1 December with a variety of traditions. Christmas Eve, Juleaften, the main event of Jul, is celebrated on the evening of 24 December, the evening before the two Christmas holidays, 25 and 26 December. Celebrating on the eve before Christmas is also used for most other holidays in Denmark.

Jul or jol is the term used for the Christmas holiday season in Scandinavia and parts of Scotland. Originally, jul was the name of a month in the old Germanic calendar. The concept of jul as a period of time rather than a specific event prevailed in Scandinavia; in modern times, jul is a period of time stretching from the fourth Sunday before Christmas Eve, December 24, to (traditionally) mid-January at the date of Epiphany with the month of December and Christmas, and the week up to the New Year, as its highlight. The modern English yule and yuletide are cognates with this term.

Christmas Eve is the evening or entire day before Christmas, the festival commemorating the birth of Jesus. Christmas Day is observed around the world, and Christmas Eve is widely observed as a full or partial holiday in anticipation of Christmas Day. Together, both days are considered one of the most culturally significant celebrations in Christendom and Western society.