| Siena Detroit | Eastern Time | 05:00 |
| Siena Matola | Central Africa Time | -01:00 |
| Siena Culiacán Rosales | Mexican Pacific Time | 08:00 |
| Siena Zaragoza | Central European Time | 00:00 |
| Siena Gorakhpur | India Standard Time | -04:30 |
| Siena Xiangtan | China Time | -07:00 |
| Siena Ipoh | Malaysia Time | -07:00 |
| Siena Mississauga | Eastern Time | 05:00 |
| Siena Boston | Eastern Time | 05:00 |
| Siena Puyang Chengguanzhen | China Time | -07:00 |
| Siena Nantong | China Time | -07:00 |
| Siena Mudanjiang | China Time | -07:00 |
| Siena Athens | Eastern European Time | -01:00 |
| Siena Santo André | Brasilia Time | 04:00 |
| Siena Nouakchott | Greenwich Mean Time | 01:00 |
| Siena Pointe-Noire | West Africa Time | 00:00 |
| Siena Aguascalientes | Central Time | 07:00 |
| Siena Memphis | Central Time | 06:00 |
| Siena Kryvyi Rih | Eastern European Time | -01:00 |
| Siena Acapulco | Central Time | 07:00 |
| Siena João Pessoa | Brasilia Time | 04:00 |
| Siena Ansan-si | Korean Time | -08:00 |
| Siena Benghazi | Eastern European Time | -01:00 |
| Siena Frankfurt | Central European Time | 00:00 |
| Siena Krasnodar | Moscow Time | -02:00 |
| Siena Guilin | China Time | -07:00 |
| Siena Palermo | Central European Time | 00:00 |
| Siena Colombo | India Standard Time | -04:30 |
| Siena Lilongwe | Central Africa Time | -01:00 |
| Siena Oran | Central European Time | 00:00 |
| Siena Diyarbakir | Turkey Time | -02:00 |
| Siena Taguig | Philippine Time | -07:00 |
| Siena New South Memphis | Central Time | 06:00 |
| Siena Ulyanovsk | Ulyanovsk Time | -03:00 |
| Siena Kotli | Pakistan Time | -04:00 |
| Siena Okayama | Japan Time | -08:00 |
| Siena Zhanjiang | China Time | -05:00 |
| Siena Ahmadi | Arabian Time | -02:00 |
| Siena Yogyakarta | Western Indonesia Time | -06:00 |
| Siena North York | Eastern Time | 05:00 |
| Siena Chișinău | Eastern European Time | -01:00 |
| Siena Wrocław | Central European Time | 00:00 |
| Siena Cheongju-si | Korean Time | -08:00 |
| Siena Anyang-si | Korean Time | -08:00 |
| Siena Tebessa | Central European Time | 00:00 |
| Siena Zhenjiang | China Time | -07:00 |
| Siena Portland | Pacific Time | 08:00 |
| Siena Winnipeg | Central Time | 06:00 |
| Siena Andong | China Time | -07:00 |
| Siena Oklahoma City | Central Time | 06:00 |