Written byLibrary Hours 24 Editorial TeamVerified & Updated: March 17, 2026
✓Last Updated: March 2026 | Verified by Library Hours 24 Team
Published: January 2, 2025 | 6 min read
Helpful Guide
The iconic McKim Building and modern Johnson Building o...
Monday-Thursday: 9 AM - 9 PM
Friday-Saturday: 9 AM - 5 PM
Sunday: 1 PM - 5 PM (Oct-May)
The iconic McKim Building and modern Johnson Building offer extensive research collections and study spaces.
Helpful Guide
MIT offers some of the best library hours in Boston:
Hayden Library: 24/7 during term
Barker Library: 24/7 reading room
Dewey Library: Extended hours
Access & Membership
24/7 access for Harvard ID holders during term
Monday-Thursday: 9 AM - 10 PM
Friday: 9 AM - 5 PM
Saturday: 9 AM - 5 PM
Sunday: 12 PM - 7 PM
Access & Membership
24/7 access for Harvard ID holders during term
Finals & Exam Period
Regular semester: Open until 2 AM
Finals week: 24-hour access
Weekend hours: Saturday 8 AM - 10 PM, Sunday 10 AM - 2 AM
Helpful Guide
Quick Tip
Monday-Thursday: 8 AM - 2 AM
Friday: 8 AM - 11 PM
Saturday: 10 AM - 11 PM
Sunday: 10 AM - 2 AM
For late-night studying in Boston:
For late-night studying in Boston:
MIT Libraries (24/7 for MIT community)
Lamont Library at Harvard (24/7 for students)
BU GSU Study Lounges (24 hours)
Northeastern Snell (until 2 AM)
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Library Access Specialists
Library Access Specialists
We're a team of library enthusiasts, former librarians, and researchers dedicated to making library information accessible to everyone. With over 15 years of combined experience navigating library systems worldwide, we understand the frustrations of finding accurate library hours—and we've built this resource to help you.
