Hours

Locations and Directions

O'Leary Library
61 Wilder Street, Lowell, MA 01854
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Lydon Library
84 University Avenue, Lowell, MA 01854
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Center for Lowell History
Patrick J. Mogan Cultural Center
40 French Street, Lowell, MA 01852
Get Directions
Make an appointment at CLH: archives@uml.edu

Email a Librarian: ask@uml.libanswers.com
Call the Library: (978) 934-4550

Library Hours

This Week
This Month

Display of Opening hours
	Apr 14 Monday	Apr 15 Tuesday	Apr 16 Wednesday	Apr 17 Thursday	Apr 18 Friday	Apr 19 Saturday	Apr 20 Sunday
O'Leary Library	7:30 a.m. – 11:00 p.m.	7:30 a.m. – 11:00 p.m.	7:30 a.m. – 11:00 p.m.	7:30 a.m. – 11:00 p.m.	7:30 a.m. – 6:00 p.m.	10:00 a.m. - 6:00 p.m.	3:00 p.m. - 11:00 p.m.
Lydon Library	7:30 a.m. – 10:00 p.m.	7:30 a.m. – 10:00 p.m.	7:30 a.m. – 10:00 p.m.	7:30 a.m. – 10:00 p.m.	7:30 a.m. – 6:00 p.m.	10:00 a.m. - 6:00 p.m.	2:00 p.m. - 10:00 p.m.
Center for Lowell History	By appointment	By appointment	By appointment	By appointment	Closed	By Appointment	Closed

Display of Opening hours
	Apr 21 Monday	Apr 22 Tuesday	Apr 23 Wednesday	Apr 24 Thursday	Apr 25 Friday	Apr 26 Saturday	Apr 27 Sunday
O'Leary Library	2:00 p.m. - 10:00 p.m.	7:30 a.m. – 11:00 p.m.	7:30 a.m. – 11:00 p.m.	7:30 a.m. – 11:00 p.m.	7:30 a.m. – 11:45 p.m.	10am – 11:45pm	1:00 p.m. – 11:45 p.m.
Lydon Library	2:00 p.m. - 10:00 p.m.	7:30 a.m. – 10:00 p.m.	7:30 a.m. – 10:00 p.m.	7:30 a.m. – 10:00 p.m.	7:30 a.m. – 11:45 p.m.	10am – 11:45pm	1:00 p.m. – 11:45 p.m.
Center for Lowell History	Closed Patriots' Day	By appointment	By appointment	By appointment	Closed	Closed	Closed

Display of Opening hours
	Apr 28 Monday	Apr 29 Tuesday	Apr 30 Wednesday	May 01 Thursday	May 02 Friday	May 03 Saturday	May 04 Sunday
O'Leary Library	7:30 a.m. – 11:45 p.m.	7:30 a.m. – 11:45 p.m.	7:30 a.m. – 11:45 p.m.	7:30 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	1:00 p.m. – 11:45 p.m.
Lydon Library	7:30 a.m. – 11:45 p.m.	7:30 a.m. – 11:45 p.m.	7:30 a.m. – 11:45 p.m.	7:30 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	1:00 p.m. – 11:45 p.m.
Center for Lowell History	By appointment	By appointment	By appointment	By appointment	Closed	Closed	Closed

Display of Opening hours
	May 05 Monday	May 06 Tuesday	May 07 Wednesday	May 08 Thursday	May 09 Friday	May 10 Saturday	May 11 Sunday
O'Leary Library	7:00 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	7:00 a.m. - 10:00 p.m.	8:00 a.m. - 5:00 p.m.	Closed	Closed
Lydon Library	7:00 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	7:00 a.m. – 11:45 p.m.	7:00 a.m. - 10:00 p.m.	8:00 a.m. - 5:00 p.m.	Closed	Closed
Center for Lowell History	By appointment	By appointment	By appointment	By appointment	Closed	–	–

Display of Opening hours
	May 12 Monday	May 13 Tuesday	May 14 Wednesday	May 15 Thursday	May 16 Friday	May 17 Saturday	May 18 Sunday
O'Leary Library	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	May 19 Monday	May 20 Tuesday	May 21 Wednesday	May 22 Thursday	May 23 Friday	May 24 Saturday	May 25 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	May 26 Monday	May 27 Tuesday	May 28 Wednesday	May 29 Thursday	May 30 Friday	May 31 Saturday	Jun 01 Sunday
O'Leary Library	Closed Memorial Day	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	Closed Memorial Day	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jun 02 Monday	Jun 03 Tuesday	Jun 04 Wednesday	Jun 05 Thursday	Jun 06 Friday	Jun 07 Saturday	Jun 08 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jun 09 Monday	Jun 10 Tuesday	Jun 11 Wednesday	Jun 12 Thursday	Jun 13 Friday	Jun 14 Saturday	Jun 15 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jun 16 Monday	Jun 17 Tuesday	Jun 18 Wednesday	Jun 19 Thursday	Jun 20 Friday	Jun 21 Saturday	Jun 22 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	Closed Juneteenth	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	Closed Juneteenth	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jun 23 Monday	Jun 24 Tuesday	Jun 25 Wednesday	Jun 26 Thursday	Jun 27 Friday	Jun 28 Saturday	Jun 29 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jun 30 Monday	Jul 01 Tuesday	Jul 02 Wednesday	Jul 03 Thursday	Jul 04 Friday	Jul 05 Saturday	Jul 06 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 2pm	Closed Independence Day	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 2pm	Closed Independence Day	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jul 07 Monday	Jul 08 Tuesday	Jul 09 Wednesday	Jul 10 Thursday	Jul 11 Friday	Jul 12 Saturday	Jul 13 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jul 14 Monday	Jul 15 Tuesday	Jul 16 Wednesday	Jul 17 Thursday	Jul 18 Friday	Jul 19 Saturday	Jul 20 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jul 21 Monday	Jul 22 Tuesday	Jul 23 Wednesday	Jul 24 Thursday	Jul 25 Friday	Jul 26 Saturday	Jul 27 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Jul 28 Monday	Jul 29 Tuesday	Jul 30 Wednesday	Jul 31 Thursday	Aug 01 Friday	Aug 02 Saturday	Aug 03 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Aug 04 Monday	Aug 05 Tuesday	Aug 06 Wednesday	Aug 07 Thursday	Aug 08 Friday	Aug 09 Saturday	Aug 10 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Aug 11 Monday	Aug 12 Tuesday	Aug 13 Wednesday	Aug 14 Thursday	Aug 15 Friday	Aug 16 Saturday	Aug 17 Sunday
O'Leary Library	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 7pm	8am – 5pm	8am – 7pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Aug 18 Monday	Aug 19 Tuesday	Aug 20 Wednesday	Aug 21 Thursday	Aug 22 Friday	Aug 23 Saturday	Aug 24 Sunday
O'Leary Library	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
	Aug 25 Monday	Aug 26 Tuesday	Aug 27 Wednesday	Aug 28 Thursday	Aug 29 Friday	Aug 30 Saturday	Aug 31 Sunday
O'Leary Library	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	Closed	Closed
Lydon Library	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	8am – 5pm	Closed	Closed
Center for Lowell History	–	–	–	–	–	–	–

Display of Opening hours
April 2025
Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
	1	2	3	4	5	6
7	8	9	10	11	12	13
14 O'Leary Library 7:30 a.m. – 11:00 p.m. Lydon Library 7:30 a.m. – 10:00 p.m. Center for Lowell History By appointment	15 O'Leary Library 7:30 a.m. – 11:00 p.m. Lydon Library 7:30 a.m. – 10:00 p.m. Center for Lowell History By appointment	16 O'Leary Library 7:30 a.m. – 11:00 p.m. Lydon Library 7:30 a.m. – 10:00 p.m. Center for Lowell History By appointment	17 O'Leary Library 7:30 a.m. – 11:00 p.m. Lydon Library 7:30 a.m. – 10:00 p.m. Center for Lowell History By appointment	18 O'Leary Library 7:30 a.m. – 6:00 p.m. Lydon Library 7:30 a.m. – 6:00 p.m. Center for Lowell History Closed	19 O'Leary Library 10:00 a.m. - 6:00 p.m. Lydon Library 10:00 a.m. - 6:00 p.m. Center for Lowell History By Appointment	20 O'Leary Library 3:00 p.m. - 11:00 p.m. Lydon Library 2:00 p.m. - 10:00 p.m. Center for Lowell History Closed
21 O'Leary Library 2:00 p.m. - 10:00 p.m. Lydon Library 2:00 p.m. - 10:00 p.m. Center for Lowell History Closed Patriots' Day	22 O'Leary Library 7:30 a.m. – 11:00 p.m. Lydon Library 7:30 a.m. – 10:00 p.m. Center for Lowell History By appointment	23 O'Leary Library 7:30 a.m. – 11:00 p.m. Lydon Library 7:30 a.m. – 10:00 p.m. Center for Lowell History By appointment	24 O'Leary Library 7:30 a.m. – 11:00 p.m. Lydon Library 7:30 a.m. – 10:00 p.m. Center for Lowell History By appointment	25 O'Leary Library 7:30 a.m. – 11:45 p.m. Lydon Library 7:30 a.m. – 11:45 p.m. Center for Lowell History Closed	26 O'Leary Library 10am – 11:45pm Lydon Library 10am – 11:45pm Center for Lowell History Closed	27 O'Leary Library 1:00 p.m. – 11:45 p.m. Lydon Library 1:00 p.m. – 11:45 p.m. Center for Lowell History Closed
28 O'Leary Library 7:30 a.m. – 11:45 p.m. Lydon Library 7:30 a.m. – 11:45 p.m. Center for Lowell History By appointment	29 O'Leary Library 7:30 a.m. – 11:45 p.m. Lydon Library 7:30 a.m. – 11:45 p.m. Center for Lowell History By appointment	30 O'Leary Library 7:30 a.m. – 11:45 p.m. Lydon Library 7:30 a.m. – 11:45 p.m. Center for Lowell History By appointment

Display of Opening hours
May 2025
Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
			1 O'Leary Library 7:30 a.m. – 11:45 p.m. Lydon Library 7:30 a.m. – 11:45 p.m. Center for Lowell History By appointment	2 O'Leary Library 7:00 a.m. – 11:45 p.m. Lydon Library 7:00 a.m. – 11:45 p.m. Center for Lowell History Closed	3 O'Leary Library 7:00 a.m. – 11:45 p.m. Lydon Library 7:00 a.m. – 11:45 p.m. Center for Lowell History Closed	4 O'Leary Library 1:00 p.m. – 11:45 p.m. Lydon Library 1:00 p.m. – 11:45 p.m. Center for Lowell History Closed
5 O'Leary Library 7:00 a.m. – 11:45 p.m. Lydon Library 7:00 a.m. – 11:45 p.m. Center for Lowell History By appointment	6 O'Leary Library 7:00 a.m. – 11:45 p.m. Lydon Library 7:00 a.m. – 11:45 p.m. Center for Lowell History By appointment	7 O'Leary Library 7:00 a.m. – 11:45 p.m. Lydon Library 7:00 a.m. – 11:45 p.m. Center for Lowell History By appointment	8 O'Leary Library 7:00 a.m. - 10:00 p.m. Lydon Library 7:00 a.m. - 10:00 p.m. Center for Lowell History By appointment	9 O'Leary Library 8:00 a.m. - 5:00 p.m. Lydon Library 8:00 a.m. - 5:00 p.m. Center for Lowell History Closed	10 O'Leary Library Closed Lydon Library Closed	11 O'Leary Library Closed Lydon Library Closed
12 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	13 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	14 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	15 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	16 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	17 O'Leary Library Closed Lydon Library Closed	18 O'Leary Library Closed Lydon Library Closed
19 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	20 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	21 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	22 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	23 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	24 O'Leary Library Closed Lydon Library Closed	25 O'Leary Library Closed Lydon Library Closed
26 O'Leary Library Closed Memorial Day Lydon Library Closed Memorial Day	27 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	28 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	29 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	30 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	31 O'Leary Library Closed Lydon Library Closed

Display of Opening hours
June 2025
Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
						1 O'Leary Library Closed Lydon Library Closed
2 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	3 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	4 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	5 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	6 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	7 O'Leary Library Closed Lydon Library Closed	8 O'Leary Library Closed Lydon Library Closed
9 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	10 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	11 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	12 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	13 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	14 O'Leary Library Closed Lydon Library Closed	15 O'Leary Library Closed Lydon Library Closed
16 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	17 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	18 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	19 O'Leary Library Closed Juneteenth Lydon Library Closed Juneteenth	20 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	21 O'Leary Library Closed Lydon Library Closed	22 O'Leary Library Closed Lydon Library Closed
23 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	24 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	25 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	26 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	27 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	28 O'Leary Library Closed Lydon Library Closed	29 O'Leary Library Closed Lydon Library Closed
30 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm

Display of Opening hours
July 2025
Monday	Tuesday	Wednesday	Thursday	Friday	Saturday	Sunday
	1 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	2 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	3 O'Leary Library 8am – 2pm Lydon Library 8am – 2pm	4 O'Leary Library Closed Independence Day Lydon Library Closed Independence Day	5 O'Leary Library Closed Lydon Library Closed	6 O'Leary Library Closed Lydon Library Closed
7 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	8 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	9 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	10 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	11 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	12 O'Leary Library Closed Lydon Library Closed	13 O'Leary Library Closed Lydon Library Closed
14 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	15 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	16 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	17 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	18 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	19 O'Leary Library Closed Lydon Library Closed	20 O'Leary Library Closed Lydon Library Closed
21 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	22 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	23 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	24 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	25 O'Leary Library 8am – 5pm Lydon Library 8am – 5pm	26 O'Leary Library Closed Lydon Library Closed	27 O'Leary Library Closed Lydon Library Closed
28 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	29 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm	30 O'Leary Library 8am – 7pm Lydon Library 8am – 5pm	31 O'Leary Library 8am – 5pm Lydon Library 8am – 7pm