The reading rooms are closed on Sundays, public holidays and certain additional closing days. The latter are decided upon in an official decree by the government, which is issued at the beginning of the year.

• 1 January (New Year’s Day)
• 10 April (Easter Monday)
• 1 May (Labour Day)
• from 18 to 21 May (Ascension Day)
• 39 May (Whit Monday)
• 21 July (Belgian National Day)
• 14 and 15 August (Assumption Day)
• from 1 to 4 November (All Saints’ and All Souls’ Day)
• 11 November (Armistice Day)
• 15 November (King’s Feast)
• Closed from 25 December to 1 January
• Closed on Saturdays in July and August

The KBR museum is closed on Mondays and the following holidays: 

• 1 January (New Year’s Day)
• 9 and 10 April (Easter)
• 1 May (Labour Day)
• 18 May (Ascension Day)
• 29 May (Whit Monday)
• 21 July (Belgian National Day)
• 15 August (Assumption Day)
• 1 November (All Saints’ Day)
• 11 November (Armistice Day)
• 25 December (Christmas)