Overview

• Grand Duke Henri is set to abdicate at 10:00 local time in the Grand Ducal Palace, with Guillaume’s oath in Parliament at 11:00 followed by a city hall visit and a balcony appearance.
• Guests include the Dutch and Belgian royal couples with their heirs, Germany’s President Frank-Walter Steinmeier, France’s President Emmanuel Macron, and EU leaders António Costa and Roberta Metsola.
• The ‘Trounwiessel’ events run October 3–5, featuring a nationwide tour on Saturday and a large concert with a drone show on Glacis-Platz, ending with a cathedral service on Sunday.
• After a year as lieutenant-representative, the 43-year-old steps into a largely ceremonial role in a planned generational transition.
• Prince Charles, 5, becomes heir; under Luxembourg’s constitution, a regency led by Prince Félix would be required if a minor inherited before turning 18.