William James Hall is open from 7:00 a.m. to 9:00 p.m., Monday through Friday, and from 8:00 a.m. to 5:00 p.m., on Saturday and Sunday.
On holidays, and weeknights after business hours the doors are locked and ventilation is somewhat reduced. Entering the building after hours is via Harvard ID card access. If you need access after hours please have your faculty advisor, lab manager, or department administrator contact Building Services to authorize access.
William James Hall B12
Hours: M-F, 9AM-1PM and 2PM-5PM