Library hours may vary by location or service desk. You can call for current hours:
| Location | Monday - Thursday | Friday | Saturday | Sunday |
| Carlson Library (see Upper & Lower Level hours in Calendar format) | ||||
| Information Commons (1st Floor) (Rocket Card needed after 12 midnight) | Open 24 hours | Open until 8 p.m. | 9 a.m. - 8 p.m. | 12 noon - 12 midnight |
| Upper & Lower Levels | 7:30 a.m. - 12 midnight | 7:30 a.m. - 8 p.m. | 9 a.m. - 8 p.m. | 12 noon - 12 midnight |
| Reference Desk | 9 a.m. - 9 p.m. | 9 a.m. - 5 p.m. | 12 noon - 5 p.m. | 12 noon - 8 p.m. |
| Canaday Center | 8 a.m. - 5 p.m. | 8 a.m. - 5 p.m. | Closed | Closed |
| Microform & Multimedia | 7:30 a.m. - 12 midnight | 7:30 a.m. - 8 p.m. | 9 a.m. - 8 p.m. | 12 noon - 12 midnight |
| Government Documents Office | 8 a.m. - 5 p.m. | 8 a.m. - 5 p.m. | Closed | Closed |
| McMaster Engineering Library | ||||
| 8 a.m. - 5 p.m. | 8 a.m. - 5 p.m. | Closed | Closed | |
| Mulford Health Science Library (hours vary -- see: Mulford Library Hours) | ||||
| 7:30 a.m. - 12 midnight | 7:30 a.m. - 7 p.m. | 10 a.m. - 10 p.m. | 10 a.m. - 10 p.m. | |
| LaValley Law Library | ||||
| 7:30 a.m. - 12 midnight | 7:30 a.m. - 12 midnight | 9 a.m. - 12 midnight | 9 a.m. - 12 midnight | |
| Book Depository | ||||
| 8:30 a.m. - 4:30 p.m. | 8:30 a.m. - 11 a.m. | Closed | Closed | |
LaValley Law Library maintains their own page of exceptions.
Mulford Library maintains their own page of exceptions.
|
Carlson Library Special Hours | ||
| Sunday September 6 | Labor Day Weekend | 12:00 noon - 5:00 p.m. |
| Monday September 7 | Labor Day | CLOSED |
| Wednesday November 11 | Veterans Day | 12:00 noon - 12:00 midnight |
| Wednesday November 25 | No Classes Thanksgiving Holiday | 8:00 a.m. - 5:00 p.m. |
| Thursday November 26 | Thanksgiving Day | CLOSED |
| Friday November 27 | Thanksgiving Holiday | CLOSED |
| Saturday November 28 | Thanksgiving Holiday | 12:00 noon - 8 p.m. |
|
Carlson Library Exam Week Schedule | ||
| Sunday December 13 | Exam Week | 12:00 noon - 2:00 a.m. |
| Monday - Wednesday, December 14 - 16 | Exam Week | 7:30 a.m. - 2:00 a.m. |
| Thursday December 17 | Exam Week | 7:30 a.m. - 12:00 midnight |
| Friday December 18 | Exam Week | 7:30 a.m. - 5:00 p.m. |
|
Carlson Library Intersession Break | ||
| Saturday & Sunday December 19 - 20 | Intersession Break | CLOSED |
| Monday - Wednesday, December 21 - 23 | Intersession Break | 8 a.m. - 5 p.m. |
| Thursday - Sunday, December 24-27 | Intersession Break | CLOSED |
| Monday - Thursday, December 28 - 31 | Intersession Break | 8 a.m. - 5 p.m. |
| Friday, January 1 | Intersession Break | CLOSED |
| Saturday - Sunday, January 2 - 3 | Intersession Break | CLOSED |
| Monday - Friday, January 4 - 8 | Intersession Break | 8 a.m. - 5 p.m. |
| Saturday & Sunday, January 10 - 11 | Intersession Break | CLOSED |
