| Grudziądz Detroit | Eastern Time | 06:00 |
| Grudziądz Matola | Central Africa Time | 00:00 |
| Grudziądz Culiacán Rosales | Mexican Pacific Time | 08:00 |
| Grudziądz Zaragoza | Central European Time | 00:00 |
| Grudziądz Gorakhpur | India Standard Time | -03:30 |
| Grudziądz Xiangtan | China Time | -06:00 |
| Grudziądz Ipoh | Malaysia Time | -06:00 |
| Grudziądz Mississauga | Eastern Time | 06:00 |
| Grudziądz Boston | Eastern Time | 06:00 |
| Grudziądz Puyang Chengguanzhen | China Time | -06:00 |
| Grudziądz Nantong | China Time | -06:00 |
| Grudziądz Mudanjiang | China Time | -06:00 |
| Grudziądz Athens | Eastern European Time | -01:00 |
| Grudziądz Santo André | Brasilia Time | 05:00 |
| Grudziądz Nouakchott | Greenwich Mean Time | 02:00 |
| Grudziądz Pointe-Noire | West Africa Time | 01:00 |
| Grudziądz Aguascalientes | Central Time | 07:00 |
| Grudziądz Memphis | Central Time | 07:00 |
| Grudziądz Kryvyi Rih | Eastern European Time | -01:00 |
| Grudziądz Acapulco | Central Time | 07:00 |
| Grudziądz João Pessoa | Brasilia Time | 05:00 |
| Grudziądz Ansan-si | Korean Time | -07:00 |
| Grudziądz Benghazi | Eastern European Time | 00:00 |
| Grudziądz Frankfurt | Central European Time | 00:00 |
| Grudziądz Krasnodar | Moscow Time | -01:00 |
| Grudziądz Guilin | China Time | -06:00 |
| Grudziądz Palermo | Central European Time | 00:00 |
| Grudziądz Colombo | India Standard Time | -03:30 |
| Grudziądz Lilongwe | Central Africa Time | 00:00 |
| Grudziądz Oran | Central European Time | 01:00 |
| Grudziądz Diyarbakir | Turkey Time | -01:00 |
| Grudziądz Taguig | Philippine Time | -06:00 |
| Grudziądz New South Memphis | Central Time | 07:00 |
| Grudziądz Ulyanovsk | Ulyanovsk Time | -02:00 |
| Grudziądz Kotli | Pakistan Time | -03:00 |
| Grudziądz Okayama | Japan Time | -07:00 |
| Grudziądz Zhanjiang | China Time | -04:00 |
| Grudziądz Ahmadi | Arabian Time | -01:00 |
| Grudziądz Yogyakarta | Western Indonesia Time | -05:00 |
| Grudziądz North York | Eastern Time | 06:00 |
| Grudziądz Chișinău | Eastern European Time | -01:00 |
| Grudziądz Wrocław | Central European Time | 00:00 |
| Grudziądz Cheongju-si | Korean Time | -07:00 |
| Grudziądz Anyang-si | Korean Time | -07:00 |
| Grudziądz Tebessa | Central European Time | 01:00 |
| Grudziądz Zhenjiang | China Time | -06:00 |
| Grudziądz Portland | Pacific Time | 09:00 |
| Grudziądz Winnipeg | Central Time | 07:00 |
| Grudziądz Andong | China Time | -06:00 |
| Grudziądz Oklahoma City | Central Time | 07:00 |