Birthday of Queen Margrethe II of Denmark is celebrated on April 16. It is not a public holiday in Denmark, but the Queen typically makes an appearance, and some events are held to celebrate the monarch.

Princess Margrethe was born on April 16, 1940 to Crown Prince Frederick (future King Frederick IX of Denmark) and Princess Ingrid. On April 1947, Kind Christian X died and her father succeeded to the throne.

The royal couple had three daughters at the time, and it was clear that Queen Ingrid would have no more children. It was decided to change the constitution so that Princess Margrethe would be able to inherit the throne. The new Act of Succession was accepted in 1953.

In 1967, Margrethe married count Hernri de Laborde de Monpezat, a French diplomat. On January 14, 1972 her father died and she ascended the throne, becoming the first female Danish sovereign. Her main tasks as the Danish monarch are to be a unifying figurehead at home and to represent the country abroad.

On her birthday, the Queen usually appears either on her balcony at Amalienborg Palace (the winter residence of the royal family) or outside the Marselisborg Palace (the summer residence of the royal family) depending on where she has decided to spend her holiday.