The Atheneum is closed on the following holidays:
- New Year’s Day
- Martin Luther King Day
- Presidents’ Day
- Patriots’ Day
- Memorial Day
- Independence Day
- Labor Day
- Columbus Day
- Veterans’ Day
- Thanksgiving Day
- Day after Thanksgiving open 12 – 5 p.m.
- Christmas Eve Day open 10 a.m. – 12 p.m.
- Christmas Day
