Boxing Day is a holiday celebrated after Christmas Day, occurring on the second day of Christmastide (26 December). Though it originated as a holiday to give gifts to poor people, today Boxing Day forms part of Christmas celebrations, with many people choosing to take advantage of Boxing Day sales. It originated in Great Britain and is celebrated in several countries that previously formed part of the British Empire. The attached bank holiday or public holiday may take place on 28 December if necessary to ensure it falls on a weekday. Boxing Day is also concurrent with the Christian festival Saint Stephen's Day.

In parts of Europe, such as several regions of Spain, the Czech Republic, Germany, Austria, Hungary, the Netherlands, Italy, Poland, Slovakia, Croatia, Denmark, Finland, Sweden, Belgium, Norway, and Ireland, 26 December is Saint Stephen's Day, which is considered the second day of Christmas.