Street entertainment, live music and a Firework display at Place Piron from 15:00 - 02:00. All welcome. Assumption Day, or Assomption in France, is the day in Roman Catholic tradition when Mary, mother of Jesus Christ, was taken bodily up into heaven. It is celebrated on 15 August each year and is a Holy Day of Obligation for Catholics in France. It is also a public holiday with banks and most businesses closed.