"Every day from 10.00 – 5.00 pm
DOMunder is closed on 25 december, New Year’s Day and King’s Day on 27 April.
that is from the website

also, I attended the 1615 tour today (a Monday. Feb 16th)"
OSM snapshot date: 2026-01-25T13:04:34Z
POI name: DOMunder
POI types: wheelchair-limited fee-yes tourism-museum
#organicmaps android 2026.01.26-11-Google

"Every day from 10.00 – 5.00 pm
DOMunder is closed on 25 december, New Year’s Day and King’s Day on 27 April.

this is from the website. I visited it for the 1615 tour on Monday, 16 Feb 2026"
OSM snapshot date: 2026-01-25T13:04:34Z
POI name: DOMunder
POI types: wheelchair-limited fee-yes tourism-museum
#organicmaps android 2026.01.26-11-Google