DCU Library
Opening Hours
Opening Hours for DCU's three libraries: Cregan Library (St Patrick's Campus), O'Reilly Library (Glasnevin Campus) and Woodlock Hall Library (All Hallows Campus)
November 3rd - December 14th 2025
| Monday 3rd November - Sunday 14th December | Cregan Library | O'Reilly Library | Woodlock Hall Library |
| Monday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Tuesday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 21:00 |
| Wednesday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Thursday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 21:00 |
| Friday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Saturday | 09:30 - 17:00 | 09:30 - 17:00 | Closed |
| Sunday* | 09:00 - 17:00 | 09:00 - 17:00 | Closed |
December 15th - 19th 2025
| Monday 15th December - Friday 19th December | Cregan Library | O'Reilly Library | Woodlock Hall Library |
| Monday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Tuesday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 21:00 |
| Wednesday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Thursday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 21:00 |
| Friday | 08:30 - 17:00 | 08:30 - 17:00 | 09:30 - 17:00 |
| Saturday | Closed | Closed | Closed |
| Sunday | Closed | Closed | Closed |
*Study Only Hours means the library is open for study only, with no library help desk service.
Books can be borrowed and returned using self-service machines, access is with valid DCU ID card only.
Study Only Hours Cregan and O'Reilly Library: Monday to Thursday 8pm to midnight, Friday 5pm to midnight, 9am - 5pm Sunday.
Study Only Hours Woodlock Hall Library: Tuesday and Thursday 5pm - 9pm
January 2026 Opening Hours
| Monday 5th January - Friday 9th January | Cregan Library | O'Reilly Library | Woodlock Hall Library |
| Monday | 08:30 - 17:00 | 08:30 - 17:00 | Closed |
| Tuesday | 08:30 - 17:00 | 08:30 - 17:00 | Closed |
| Wednesday | 08:30 - 17:00 | 08:30 - 17:00 | Closed |
| Thursday | 08:30 - 17:00 | 08:30 - 17:00 | Closed |
| Friday | 08:30 - 17:00 | 08:30 - 17:00 | Closed |
| Saturday | Closed | Closed | Closed |
| Sunday | Closed | Closed | Closed |
| Monday 12th January - Sunday 1st March | Cregan Library | O'Reilly Library | Woodlock Hall Library |
| Monday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Tuesday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 21:00 |
| Wednesday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Thursday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 21:00 |
| Friday* | 08:30 - 00:00 | 08:30 - 00:00 | 09:30 - 17:00 |
| Saturday | 09:30 - 17:00 | 09:30 - 17:00 | Closed |
| Sunday | Closed | Closed | Closed |