Monday-Friday: 8 AM - midnight
Saturday: 10 AM - 8 PM
Sunday: 10 AM - midnight.
From April 22 to May 17, access to the Law Library is restricted to faculty, students, and staff of Columbia University Law School, and to others using the collections of the Arthur W. Diamond Law Library. Extended Study Hall hours will be available for Columbia Law School students only. For additional information, please consult signs posted in the Library.
Labor Day weekend: The library will be openSaturday, August 31, and Sunday, September 1, on the Regular Schedule. The Library will be closed Monday, September 2, in observance of the Labor Day holiday.