Yes, the Memorial and Museum Auschwitz-Birkenau former german nazi concentration and extermination camp is open seven days a week, from 7:30 AM. Closing hours depend on particular months:
December – 2:00 PM
January, November – 3:00 PM
February – 4:00 PM
March, October – 5:00 PM
April, May, September – 6:00 PM
June, July, August – 7:00 PM
January 1, December 25, and Easter Sunday are the only days when the Museum is closed.