Library Hours

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Check hours for Butler Library Service Hours

Open to all during Butler Library Service Hours; all other hours are limited to current students, faculty, and staff of Columbia University and its affiliates.

During 24/7 hours, each of the 24-hour reading rooms will close for one hour for maintenance. Room closures and other information about the reading rooms may be found here.
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November 2014 : Butler Library 24-Hour Reading Rooms

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Early Closing
Midnight-5:00pm
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University Holiday
Closed
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Early Closing
9:00am-5:00pm
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24 Hours Resumes at 11 am
11:00am-Midnight
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