| Seongnam-si Klang | Malaysia Time | 01:00 |
| Seongnam-si Mendoza | Argentina Time | 12:00 |
| Seongnam-si Konya | Turkey Time | 06:00 |
| Seongnam-si Mbuji-Mayi | Central Africa Time | 07:00 |
| Seongnam-si Vijayawada | India Standard Time | 03:30 |
| Seongnam-si Pikine | Greenwich Mean Time | 09:00 |
| Seongnam-si Turin | Central European Time | 08:00 |
| Seongnam-si Mysore | India Standard Time | 03:30 |
| Seongnam-si Jacksonville | Eastern Time | 14:00 |
| Seongnam-si Wenzhou | China Time | 01:00 |
| Seongnam-si San Francisco | Pacific Time | 17:00 |
| Seongnam-si Liverpool | United Kingdom Time | 09:00 |
| Seongnam-si Saratov | Saratov Time | 05:00 |
| Seongnam-si Tegucigalpa | Central Time | 15:00 |
| Seongnam-si Bucheon-si | Korean Time | 00:00 |
| Seongnam-si Columbus | Eastern Time | 14:00 |
| Seongnam-si Voronezh | Moscow Time | 06:00 |
| Seongnam-si Ranchi | India Standard Time | 03:30 |
| Seongnam-si Naucalpan | Central Time | 15:00 |
| Seongnam-si Ulaanbaatar | Ulaanbaatar Time | 01:00 |
| Seongnam-si Takeo | Indochina Time | 02:00 |
| Seongnam-si Ahwaz | Iran Time | 05:30 |
| Seongnam-si Arequipa | Peru Time | 14:00 |
| Seongnam-si Padang | Western Indonesia Time | 02:00 |
| Seongnam-si Hubli | India Standard Time | 03:30 |
| Seongnam-si Marrakesh | Western European Time | 08:00 |
| Seongnam-si Denpasar | Central Indonesia Time | 01:00 |
| Seongnam-si Kampung Baru Subang | Malaysia Time | 01:00 |
| Seongnam-si Fort Worth | Central Time | 15:00 |
| Seongnam-si Indianapolis | Eastern Time | 14:00 |
| Seongnam-si Charlotte | Eastern Time | 14:00 |
| Seongnam-si Duque de Caxias | Brasilia Time | 12:00 |
| Seongnam-si Jos | West Africa Time | 08:00 |
| Seongnam-si Valencia | Central European Time | 08:00 |
| Seongnam-si Ilorin | West Africa Time | 08:00 |
| Seongnam-si Callao | Peru Time | 14:00 |
| Seongnam-si La Paz | Bolivia Time | 13:00 |
| Seongnam-si Ottawa | Eastern Time | 14:00 |
| Seongnam-si Barquisimeto | Venezuela Time | 13:00 |
| Seongnam-si Chihuahua | Mexican Pacific Time | 16:00 |
| Seongnam-si Nanning | China Time | 01:00 |
| Seongnam-si Freetown | Greenwich Mean Time | 09:00 |
| Seongnam-si Johor Bahru | Malaysia Time | 01:00 |
| Seongnam-si Jerusalem | Israel Time | 07:00 |
| Seongnam-si Bandar Lampung | Western Indonesia Time | 02:00 |
| Seongnam-si Bogor | Western Indonesia Time | 02:00 |
| Seongnam-si Mombasa | East Africa Time | 06:00 |
| Seongnam-si Cebu City | Philippine Time | 01:00 |
| Seongnam-si Muscat | Gulf Standard Time | 05:00 |
| Seongnam-si Zaporizhia | Eastern European Time | 07:00 |