Gratulerer med dagen!

“Norwegian Constitution Day is the National Day of Norway and is an official national holiday observed on May 17 each year. Among Norwegians, the day is referred to simply as syttende mai (meaning Seventeenth May), Nasjonaldagen (The National Day) or Grunnlovsdagen (The Constitution Day), although the latter is less frequent.” (Wikipedia)

17mai

For more information: http://www.wikiwand.com/en/Norwegian_Constitution_Day