Constitution Day, known as 'Grundlovsdag' in Denmark, is one of the country's most significant national holidays. Celebrated on June 5 each year, this day commemorates the signing of the Danish Constitution, both the first one in 1849 and the current version approved in 1953. It also doubles as Father's Day in Denmark, adding more depth and family-centered value to the occasion.

The first Danish Constitution marked a pivotal transition for the country from an absolute monarchy to a constitutional monarchy. The signing of the constitution laid down a system of governance that assigned a clear separation of powers. It ensured the empowerment of the citizens by offering them civil liberties under a system of parliamentary rule. Thus, Constitution Day in Denmark is not merely a celebration but is a reminder of Denmark's commitment to democratic principles and human rights.

On this day, many Danes attend political meetings, where politicians discuss the constitution and other current topics, reinforcing the democratic ethos of the country. Various cultural, festive events and children's activities also occur across Denmark, celebrating its history and culture. Although not everyone gets a day off, many workplaces and shops close for the day, and there is a general feeling of commemoration throughout the nation.