| Oulu Sankt Olof | Central European Time | 01:00 |
| Oulu North Brunswick Township | Eastern Time | 07:00 |
| Oulu Red Bank | Eastern Time | 07:00 |
| Oulu Voroneț | Eastern European Time | 00:00 |
| Oulu Ranya | Arabian Time | 00:00 |
| Oulu Tuggerah | Eastern Australia Time | -07:00 |
| Oulu Koshu | Japan Time | -06:00 |
| Oulu Münsingen | Central European Time | 01:00 |
| Oulu Sankt Blasien | Central European Time | 01:00 |
| Oulu North Canaan | Eastern Time | 07:00 |
| Oulu Red Bluff | Pacific Time | 10:00 |
| Oulu Vosselaar | Central European Time | 01:00 |
| Oulu Ransbach-Baumbach | Central European Time | 01:00 |
| Oulu Tullamarine | Eastern Australia Time | -07:00 |
| Oulu Korčula | Central European Time | 01:00 |
| Oulu Münster | Central European Time | 01:00 |
| Oulu Sankt Ibb | Central European Time | 01:00 |
| Oulu Nanjo | Japan Time | -06:00 |
| Oulu Redcliffe | Eastern Australia Time | -07:00 |
| Oulu Windsor | Eastern Australia Time | -07:00 |
| Oulu Raniapur | India Standard Time | -02:30 |
| Oulu Tullamore | Ireland Time | 02:00 |
| Oulu Koppa | India Standard Time | -02:30 |
| Oulu Muntinlupa | Philippine Time | -05:00 |
| Oulu Sans Souci | Eastern Australia Time | -07:00 |
| Oulu Nantucket | Eastern Time | 07:00 |
| Oulu Sackville | Atlantic Time | 06:00 |
| Oulu Windsor | Eastern Australia Time | -07:00 |
| Oulu Rümlang | Central European Time | 01:00 |
| Oulu Tulum | Eastern Time | 08:00 |
| Oulu Koratty | India Standard Time | -02:30 |
| Oulu Munxar | Central European Time | 01:00 |
| Oulu Saint Francis | Central Time | 08:00 |
| Oulu Nantwich | United Kingdom Time | 02:00 |
| Oulu Příbram | Central European Time | 01:00 |
| Oulu Windsor Locks | Eastern Time | 07:00 |
| Oulu Rapid Creek | Central Australia Time | -06:30 |
| Oulu Tunkhannock | Eastern Time | 07:00 |
| Oulu Lamar | Mountain Time | 09:00 |
| Oulu Munxar | Central European Time | 01:00 |
| Oulu Saint George | Eastern Australia Time | -07:00 |
| Oulu Nandikkara | India Standard Time | -02:30 |
| Oulu Pressbaum | Central European Time | 01:00 |
| Oulu Vostochny District | Moscow Time | 00:00 |
| Oulu Ruka | Eastern European Time | 00:00 |
| Oulu Tunis | Eastern Time | 07:00 |
| Oulu Lammhult | Central European Time | 01:00 |
| Oulu Mur-de-Sologne | Central European Time | 01:00 |
| Oulu Saint-Georges | Eastern Time | 07:00 |
| Oulu Nanded-Waghala | India Standard Time | -02:30 |