| Seongnam-si Nova Iguaçu | Brasilia Time | 12:00 |
| Seongnam-si Jieyang | China Time | 01:00 |
| Seongnam-si Odessa | Eastern European Time | 07:00 |
| Seongnam-si Zhu Cheng City | China Time | 01:00 |
| Seongnam-si Shivaji Nagar | India Standard Time | 03:30 |
| Seongnam-si Kitakyushu | Japan Time | 00:00 |
| Seongnam-si Solapur | India Standard Time | 03:30 |
| Seongnam-si Baoding | China Time | 01:00 |
| Seongnam-si Guatemala City | Central Time | 15:00 |
| Seongnam-si Benxi | China Time | 01:00 |
| Seongnam-si Zapopan | Central Time | 15:00 |
| Seongnam-si Birmingham | United Kingdom Time | 09:00 |
| Seongnam-si Perm | Yekaterinburg Time | 04:00 |
| Seongnam-si Srinagar | India Standard Time | 03:30 |
| Seongnam-si Zaria | West Africa Time | 08:00 |
| Seongnam-si Managua | Central Time | 15:00 |
| Seongnam-si Port Elizabeth | South Africa Standard Time | 07:00 |
| Seongnam-si Fes | Western European Time | 08:00 |
| Seongnam-si Cologne | Central European Time | 08:00 |
| Seongnam-si Ulsan | Korean Time | 00:00 |
| Seongnam-si Chandigarh | India Standard Time | 03:30 |
| Seongnam-si Coimbatore | India Standard Time | 03:30 |
| Seongnam-si Naples | Central European Time | 08:00 |
| Seongnam-si Maceió | Brasilia Time | 12:00 |
| Seongnam-si Cartagena | Colombia Time | 14:00 |
| Seongnam-si Changzhou | China Time | 01:00 |
| Seongnam-si Sulţānah | Arabian Time | 06:00 |
| Seongnam-si Monrovia | Greenwich Mean Time | 09:00 |
| Seongnam-si Kingston | Eastern Time | 14:00 |
| Seongnam-si Erbil | Arabian Time | 06:00 |
| Seongnam-si Austin | Central Time | 15:00 |
| Seongnam-si Krasnoyarsk | Krasnoyarsk Time | 02:00 |
| Seongnam-si Naypyitaw | Myanmar Time | 02:30 |
| Seongnam-si Jodhpur | India Standard Time | 03:30 |
| Seongnam-si Chiba | Japan Time | 00:00 |
| Seongnam-si São Luís | Brasilia Time | 12:00 |
| Seongnam-si Madurai | India Standard Time | 03:30 |
| Seongnam-si Sale | Western European Time | 08:00 |
| Seongnam-si Huaibei | China Time | 01:00 |
| Seongnam-si Cochabamba | Bolivia Time | 13:00 |
| Seongnam-si Kaifeng | China Time | 01:00 |
| Seongnam-si Bishkek | Kyrgyzstan Time | 03:00 |
| Seongnam-si Qom | Iran Time | 05:30 |
| Seongnam-si Abobo | Greenwich Mean Time | 09:00 |
| Seongnam-si Abu Ghraib | Arabian Time | 06:00 |
| Seongnam-si Guwahati | India Standard Time | 03:30 |
| Seongnam-si Aba | West Africa Time | 08:00 |
| Seongnam-si Pingdingshan | China Time | 01:00 |
| Seongnam-si Gwalior | India Standard Time | 03:30 |
| Seongnam-si Qiqihar | China Time | 01:00 |