Locations & Hours Student Mail Center: Wien Hall, Lower Level Regular Hours: beginning 9/27 Monday & Wednesday: 9 a.m. to 7 p.m. Tuesday & Thursday: 11 a.m. to 7 p.m. Friday: 11 a.m. to 6 p.m. Saturday & Sunday: Closed Holiday Closures: 11/28, 11/29, 12/24, 12/25, 12/31, 1/1 Administrative Mail Office: Service Building, Room 101 Phone: 212-854-9686 Monday - Friday: 9:00 a.m. – 5:00 p.m. Holiday Closings The Undergraduate Package Center and Administrative Mail Office are closed in observance of the following University holidays: New Year's Day Martin Luther King, Jr. Day Memorial Day Juneteenth Independence Day Labor Day Election Day Thanksgiving Day The day after Thanksgiving Christmas Eve Christmas Day New Year's Eve