The Grand Duke's Official Birthday (Luxembourgish: Groussherzogsgebuertsdag, French: Célébration publique de l'anniversaire du souverain), also known as Luxembourgish National Day (Luxembourgish: Lëtzebuerger Nationalfeierdag, French: Fête nationale luxembourgeoise, German: Luxemburgischer Nationalfeiertag),[1] is celebrated as the annual national holiday of Luxembourg.

When the monarch of Luxembourg is female, it is known as the Grand Duchess's Official Birthday.

[2] As both the then-reigning Charlotte and the heir apparent (and regent) Jean were born in January, it was feared that their actual birthdays, therefore the nation's holiday, would be marred by poor weather.

[5] A torchlight parade takes place at dusk on the evening of June 22nd, and dancing and festivities continue late until the night.

[6] June 23rd is a public holiday[7] and processions with the Grand Ducal Family of Luxembourg take place.