Facility
Different opening hours at KOG and STW during summer break
From Monday 7 July until Sunday 31 August there will be different opening hours at the Kamerlingh Onnes Building, the library and restaurant, the Café and the Old Observatory (Oude Sterrewacht, STW).
| Monday to Friday | Saturday & Sunday | |
| Kamerlingh Onnes Building (KOG) | 7.30 - 18.00 | Closed |
| KOG Library | 9.00 - 17.00 | Closed |
| Oude Sterrewacht (STW) | 8.30 - 17.00 | Closed |
| KOG Café |
9.00 - 14.30 |
Closed |
| KOG restaurant | Closed throughout summer | Closed |
Exceptions
- The Old Observatory (STW) will be closed from 21 July to 8 August.
- In the week of 7 July 2025, the KOG Café will be open from 9.00 to 18.00 and in the week of 25 August 2025, it will be open from 9.00 to 16.30.