| Unterseen Sunbury | Eastern Time | 06:00 |
| Unterseen Sawyer | Eastern Time | 06:00 |
| Unterseen Suginami | Japan Time | -08:00 |
| Unterseen Saxapahaw | Eastern Time | 06:00 |
| Unterseen Suitland-Silver Hill | Eastern Time | 06:00 |
| Unterseen Saxonburg | Eastern Time | 06:00 |
| Unterseen Sujapur | India Standard Time | -04:30 |
| Unterseen Sayalonga | Central European Time | 00:00 |
| Unterseen Sudbury | Eastern Time | 06:00 |
| Unterseen Siesta Key | Eastern Time | 06:00 |
| Unterseen Sisters | Pacific Time | 09:00 |
| Unterseen Sigatoka | Fiji Time | -11:00 |
| Unterseen Siruseri | India Standard Time | -04:30 |
| Unterseen Signal Mountain | Eastern Time | 06:00 |
| Unterseen Sirumalai | India Standard Time | -04:30 |
| Unterseen Sikardarpur | India Standard Time | -04:30 |
| Unterseen Siruganur | India Standard Time | -04:30 |
| Unterseen Sigulda | Eastern European Time | -01:00 |
| Unterseen Sirkeci | Turkey Time | -02:00 |
| Unterseen Siheung-si | Korean Time | -08:00 |
| Unterseen Sirmione | Central European Time | 00:00 |
| Unterseen Silverton | Pacific Time | 09:00 |
| Unterseen Seaford | Eastern Time | 06:00 |
| Unterseen Silveira | Western European Time | 01:00 |
| Unterseen Seahouses | United Kingdom Time | 01:00 |
| Unterseen Sikkarimedu | India Standard Time | -04:30 |
| Unterseen Singapore | South Africa Standard Time | -01:00 |
| Unterseen Silay City | Philippine Time | -07:00 |
| Unterseen Singonahalli | India Standard Time | -04:30 |
| Unterseen Tebnine | Eastern European Time | -01:00 |
| Unterseen Sint-Jans-Molenbeek | Central European Time | 00:00 |
| Unterseen Tecoma | Eastern Australia Time | -10:00 |
| Unterseen Sint-Lambrechts-Herk | Central European Time | 00:00 |
| Unterseen Te Anau | New Zealand Time | -12:00 |
| Unterseen Sint-Martens-Latem | Central European Time | 00:00 |
| Unterseen Te Awamutu | New Zealand Time | -12:00 |
| Unterseen Sint-Niklaas | Central European Time | 00:00 |
| Unterseen Tealby | United Kingdom Time | 01:00 |
| Unterseen Sion | Central European Time | 00:00 |
| Unterseen Team Valley Trading Estate | United Kingdom Time | 01:00 |
| Unterseen Zermatt | Central European Time | 00:00 |
| Unterseen Subang | Western Indonesia Time | -06:00 |
| Unterseen Zeven | Central European Time | 00:00 |
| Unterseen Suan Dok | Indochina Time | -06:00 |
| Unterseen Zero Branco | Central European Time | 00:00 |
| Unterseen Subiaco | Western Australia Time | -07:00 |
| Unterseen Zephyr | Eastern Time | 06:00 |
| Unterseen Stroudsburg | Eastern Time | 06:00 |
| Unterseen Zephyrhills | Eastern Time | 06:00 |
| Unterseen Strömstad | Central European Time | 00:00 |