| Sumter Sevierville | Eastern Time | 00:00 |
| Sumter Martin | Central Time | 01:00 |
| Sumter Wadakkanchery | India Standard Time | -09:30 |
| Sumter Masca | Western European Time | -05:00 |
| Sumter Settefrati | Central European Time | -06:00 |
| Sumter Mascali | Central European Time | -06:00 |
| Sumter Wacol | Eastern Australia Time | -14:00 |
| Sumter Masai | Malaysia Time | -12:00 |
| Sumter Seven Hills | Eastern Australia Time | -14:00 |
| Sumter Masai | Malaysia Time | -12:00 |
| Sumter Wadebridge | United Kingdom Time | -05:00 |
| Sumter Setúbal Municipality | Western European Time | -05:00 |
| Sumter Yunquera de Henares | Central European Time | -06:00 |
| Sumter Settle | United Kingdom Time | -05:00 |
| Sumter Yuo | West Africa Time | -05:00 |
| Sumter Sans Souci | Eastern Australia Time | -14:00 |
| Sumter Walchwil | Central European Time | -06:00 |
| Sumter Sankt Olof | Central European Time | -06:00 |
| Sumter Wakefield | Eastern Time | 00:00 |
| Sumter Sankt Blasien | Central European Time | -06:00 |
| Sumter Wakan | Gulf Standard Time | -08:00 |
| Sumter Sankt Ibb | Central European Time | -06:00 |
| Sumter Waite Park | Central Time | 01:00 |
| Sumter Sankari | India Standard Time | -09:30 |
| Sumter Waitomo | New Zealand Time | -16:00 |
| Sumter Sanibel | Eastern Time | 00:00 |
| Sumter Waitsfield | Eastern Time | 00:00 |
| Sumter Sângeorgiu de Mureș | Eastern European Time | -07:00 |
| Sumter Zahara de los Atunes | Central European Time | -06:00 |
| Sumter Saint-Martin-de-Belleville | Central European Time | -06:00 |
| Sumter Yvoir | Central European Time | -06:00 |
| Sumter Saint-Marcel-Campes | Central European Time | -06:00 |
| Sumter Yzeure | Central European Time | -06:00 |
| Sumter Saint Margrethen | Central European Time | -06:00 |
| Sumter Zachary | Central Time | 01:00 |
| Sumter Saint Lucia | Eastern Australia Time | -14:00 |
| Sumter Saint-Leonard | Eastern Time | 00:00 |
| Sumter Saint Julian's | Central European Time | -06:00 |
| Sumter Saint-Just-Saint-Rambert | Central European Time | -06:00 |
| Sumter Saint Leonards | Eastern Australia Time | -14:00 |
| Sumter Saint Leonards | United Kingdom Time | -05:00 |
| Sumter Somwarpet | India Standard Time | -09:30 |
| Sumter Sop Mae Kha | Indochina Time | -11:00 |
| Sumter Sonipat | India Standard Time | -09:30 |
| Sumter Sonoma | Pacific Time | 03:00 |
| Sumter Sonora | Pacific Time | 03:00 |
| Sumter Sorel | Eastern Time | 00:00 |
| Sumter Sorell | Eastern Australia Time | -14:00 |
| Sumter Soraluze | Central European Time | -06:00 |
| Sumter Sorano | Central European Time | -06:00 |