The APS is closed on Monday, January 20 in observance of Martin Luther King, Jr. Day. 

July 4 Holiday Hours

The American Philosophical Society will be closed on Wednesday, July 4, 2018. The APS Library and offices will remain closed on July 5 and 6, 2018.

During the week of July 4, the APS Museum will be open with its usual hours, Thursday–Sunday 10:00 a.m.–5:00 p.m.