Christ's Ascension is held on May 13. Or Kristi Himmelfartsdag in Norway. This event in the second decade of the month may is annual.
The day of the abolition of slavery in France on May 10 (Abolition de l'esclavage mark according to the law of May 21, 2001);
Norwegian Constitution Day on May 17 (Grunnlovsdag);
St. Yves of Kermartensky Day in Brittany, France on May 19 (Ivo Helori or Ivo Bretonsky was born on October 17, 1253, died May 19, 1303. In the Roman Catholic Church, he is considered a saint, and is traditionally considered the patron saint of lawyers, notaries and lawyers);
Whit Monday on May 24 (celebrated on the day after Pentecost);