The library's new Knowledge Center is now open.  The service desk will be staffed as follows.

Service Desk Hours
 Monday - Thursday  9 am to 7 pm
 Friday  9 am to 5 pm
 Saturday  CLOSED
 Sunday  Noon to 8 pm

15 minutes before closing time all circulation transactions should be completed.

The Knowledge Center space will remain open for 24-hour access to CUMC students, faculty, and staff only.  At the end of staffed hours, library staff will check IDs.  Knowledge Center guests without a CUMC ID will be asked to leave.  CUMC affiliates will have after-hours access via card swipe.

The Columbia University Libraries website has a calendar view of the schedule above and hours for other libraries such as Barnard and the Digital Humanities Center.

Interlibrary Loan (ILL)

Monday - Friday, 9am to 5pm.

Archives & Special Collections

Monday - Friday, 9:15am to 4:45pm, by appointment only. Telephone and email reference is available Monday - Friday, 9am to 5pm. Please contact the Archives & Special Collections at for more information