Hours & Directions
Main Library Hours
| Monday | 9:30 am - 8:30 pm |
| Tuesday | 9:30 am - 8:30 pm |
| Wednesday | 9:30 am - 8:30 pm |
| Thursday | 9:30 am - 8:30 pm |
| Friday | 9:30 am - 5:00 pm |
| Saturday | 9:30 am - 5:00 pm |
| Sunday | 1:00 pm - 5:00 pm |
MacKay Branch Library Hours
| Monday | 1:00 pm - 5:00 pm |
| Tuesday | Closed |
| Wednesday | 12:30 pm - 8:30 pm |
| Thursday | Closed |
| Friday | 9:30 am - 1:30 pm |
| Saturday | Closed |
| Sunday | Closed |
Adams Library
25 Boston Road
Chelmsford, MA 01824
978-256-5521
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MacKay Branch Library
43 Newfield Street
North Chelmsford, MA 01863
978-256-5521 x5
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2025
New Year’s Day: Wednesday, January 1
Martin Luther King, Jr. Day: Monday, January 20
President’s Day: Monday, February 17
Patriots' Day: Monday, April 21
Memorial Day: Monday, May 26
Juneteenth: Thursday, June 19
Independence Day: Friday, July 4
Labor Day: Monday, September 1
Indigenous Peoples' Day: Monday, October 13
Veterans Day: Tuesday, November 11
Thanksgiving: Wednesday, November 26 (closing at 5pm), Thursday, November 27 – Friday, November 28
Christmas: Wednesday, December 24 - Thursday, December 25
New Year’s Eve: Wednesday, December 31 (closing at 1pm)
New Year's Day 2026: Thursday, January 1
The Library is OPEN on Sundays from October 20 until Memorial Day Weekend.