The Casimir Pulaski Museum is closed on following holidays:
- January 1, New Year's Day
- January 6, Epiphany
- Easter, from Saturday through Monday
- May 1, May Day
- Corpus Christi
- August 15, Polish Armed Forces Day, and Assumption of the Blessed Virgin Mary
- November 1, All Saints' Day
- December 24, Christmas Eve
- December 25, Christmas Day