Mandag

Mandag is the name of the second day of the week in Danish and Norwegian. It is also used in related Germanic languages to refer to the same day. In most European calendars, mandag lies between Sunday and Tuesday and is typically a workday.

Mandag derives from Old Norse manadag(r) or maanadagr, literally "Moon's day." It is part of a North Germanic family of weekday names formed from the Moon and the word for day. Cognates include English Monday, Dutch maandag, German Montag, and Swedish måndag, all linked to the same root.

In calendar conventions, ISO 8601 designates Monday as the first day of the week. Many European cultures begin the workweek on Monday, making it the first working day. Some calendars and traditions, however, start the week on Sunday.

In daily use, mandag refers to the day itself and appears in phrases such as "i mandag" in Danish and Norwegian. The idea of Monday as the start of the workweek influences scheduling, education, and business practices in Danish- and Norwegian-speaking areas.