Denmark has around 400 islands off its coast. Its capital and largest city is Copenhagen. Danish culture is characterized by regional traditions and a unity that is sometimes strained between local and national histories. Children attend kindergarten starting at age 3 and often continue school until their early teens. Traditions around Christmas include decorating trees in December leading up to Christmas Eve, when families have meals including duck or goose and rice pudding. Denmark has a history as the home of the Vikings from 800-1050 AD.