The legal age for marriage in Denmark is 18 years, but permission may be sought in special circumstances if an under 18 wants to get married. To get married in Denmark or abroad, you need to fill in a notice of marriage (ægteskabserklæring) and have it approved. The earliest you can apply is four months before you wish to get married.
For more information in English regarding marriage in Denmark, please visit the Danish Familieretshuset (Agency of Family... Nanna married Laurids Madsen Kvist on month day 1926, at age 22 at marriage place. She was buried at burial place.