The Open-air Museum operates from 9:45 AM to 5:00 PM daily, with extended hours until 5:30 PM during June 1 to August 31. Last admission is 30 minutes before closing time. The museum is open every day from April 29 to November 3. Outside this period (November 4 to April 28), the outdoor sculpture garden is closed on Mondays, except when a national holiday falls on Monday, in which case it opens and closes the following day instead.