| Sumter Ciudad Juarez | Mountain Time | 02:00 |
| Sumter Manhattan | Eastern Time | 00:00 |
| Sumter Asuncion | Paraguay Time | 00:00 |
| Sumter Recife | Brasilia Time | -01:00 |
| Sumter Daejeon | Korean Time | -13:00 |
| Sumter San Antonio | Central Time | 01:00 |
| Sumter Kumasi | Greenwich Mean Time | -04:00 |
| Sumter Kota Bharu | Malaysia Time | -12:00 |
| Sumter Kyoto | Japan Time | -13:00 |
| Sumter Kuala Lumpur | Malaysia Time | -12:00 |
| Sumter Karaj | Iran Time | -08:30 |
| Sumter Kathmandu | Nepal Time | -09:45 |
| Sumter Palembang | Western Indonesia Time | -11:00 |
| Sumter Multan | Pakistan Time | -09:00 |
| Sumter Tirunelveli | India Standard Time | -09:30 |
| Sumter Hanoi | Indochina Time | -11:00 |
| Sumter Kharkiv | Eastern European Time | -07:00 |
| Sumter Agra | India Standard Time | -09:30 |
| Sumter Córdoba | Argentina Time | -01:00 |
| Sumter Tabriz | Iran Time | -08:30 |
| Sumter Novosibirsk | Novosibirsk Time | -11:00 |
| Sumter Gwangju | Korean Time | -13:00 |
| Sumter Bursa | Turkey Time | -07:00 |
| Sumter Vadodara | India Standard Time | -09:30 |
| Sumter Belém | Brasilia Time | -01:00 |
| Sumter Fushun | China Time | -12:00 |
| Sumter Quito | Ecuador Time | 01:00 |
| Sumter San Diego | Pacific Time | 03:00 |
| Sumter Fukuoka | Japan Time | -13:00 |
| Sumter Antananarivo | East Africa Time | -07:00 |
| Sumter Luoyang | China Time | -12:00 |
| Sumter Hyderabad | Pakistan Time | -09:00 |
| Sumter Borough of Bronx | Eastern Time | 00:00 |
| Sumter Valencia | Venezuela Time | 00:00 |
| Sumter Gujranwala | Pakistan Time | -09:00 |
| Sumter Barranquilla | Colombia Time | 01:00 |
| Sumter Guankou | China Time | -12:00 |
| Sumter Tijuana | Pacific Time | 03:00 |
| Sumter Lubumbashi | Central Africa Time | -06:00 |
| Sumter Porto Alegre | Brasilia Time | -01:00 |
| Sumter Tangerang | Western Indonesia Time | -11:00 |
| Sumter Santa Cruz | Bolivia Time | 00:00 |
| Sumter Handan | China Time | -12:00 |
| Sumter Kampala | East Africa Time | -07:00 |
| Sumter Yekaterinburg | Yekaterinburg Time | -09:00 |
| Sumter Khulna | Bangladesh Time | -10:00 |
| Sumter Douala | West Africa Time | -05:00 |
| Sumter Gorakhpur | India Standard Time | -09:30 |
| Sumter Mecca | Arabian Time | -07:00 |
| Sumter Makassar | Central Indonesia Time | -12:00 |