Hours
Fall 2025 Hours (September 2 - December 19)
| Day | Circulation & Help Desk | 
|---|---|
| Mon. - Thurs. | 9am - 7pm | 
| Fri. | 9am - 6pm | 
| Sat. | 9am - 5pm | 
| Sun. | CLOSED | 
| Day | Study Spaces LL-5* | 
|---|---|
| Mon. - Fri. | 8am - midnight | 
| Sat. | 9am - midnight | 
| Sun. | 10am - midnight | 
For after hours library help, chat with a librarian through the Columbia Libraries Virtual Reference Desk.
See Studying & Collaboration for information on study areas.
CU/BC ID Swipe is required to enter the Milstein Center building at all times as well as to exit the closed stairwells and use the elevator outside of Library Service Hours; please visit Accessing Barnard Campus for more information about whether and how you can access campus.
Prior to a holiday, the building closes at 4pm
| Holiday - Library closed | Study spaces close at 4pm | 
|---|---|
| Monday, September 1 | Friday, August 29 | 
| Tuesday, November 4 | Monday, November 3 | 
| Thursday, November 27 - Friday, November 28 | Wednesday, November 26 | 
| Saturday, December 20 - Thursday, January 1 | Friday, December 19 |