Boston Library Hours Guide 2026

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:

1. MIT Libraries (24/7 for MIT community)
2. Lamont Library at Harvard (24/7 for students)
3. BU GSU Study Lounges (24 hours)
4. Northeastern Snell (until 2 AM)