23 June 2026

Over the summer break, the opening hours at the Kamerlingh Onnes Gebouw (KOG), the KOG library and the KOG restaurant will change.

	Monday to Friday	Saturday & Sunday
Kamerlingh Onnes Gebouw (KOG) (from 25 July to 23 August	7.30 - 18.00	Closed
KOG library  (from 6 July to 30 August	9.00 - 17.00	Closed
Old Observatory (STW) (from 25 July to 16 August)	Closed	Closed
Old Observatory (STW)  (from 16 August to 23 August)	8.00 - 18.00	Closed

 

Restaurant and café

Different opening hours from Monday 6 July to Sunday 30 August at KOG restaurant and the Juridisch Café.

	Monday to Friday	Saturday & Sunday
Juridisch Café	9.00 - 14.30	Closed
KOG restaurant	Closed	Closed

Exceptions

• The Juridisch Café will be open in the week of 6-7-2026 from 9.00-18.00 and in the week of 24-08-2026 and 31-08-2026 from 9.00-16.30.