What is Crown Princess Mette Marit day Holiday ?

Mette-Marit, Crown Princess of Norway (née Tjessem Høiby; born 19 August 1973 in Kristiansand, Norway), is the wife of Crown Prince Haakon, heir apparent to the throne of Norway. A Norwegian commoner and a single mother with a rebellious past, she was a controversial figure at the time of her engagement to Haakon in 2000. She became crown princess of Norway upon her marriage in 2001. As such, she has championed humanitarian projects and arts, as well as taking part in official visits at home and abroad.