Syttende Mai

Our head Norwegian hoisted the colors into a snappy breeze this morning to honor Norway's Constitution Day. That's him speeding away in his pickup, he's much too quick for the neighborhood photographer.
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 May Seventeenth), Nasjonaldagen (The National Day) or Grunnlovsdagen (The Constitution Day), although the latter is less frequent.

(Source: Wikipedia, of course, not Bud Osmundson, who is an authority on other matters.)