| Siena Bratislava | Central European Time | 00:00 |
| Siena Gaya | India Standard Time | -03:30 |
| Siena Udaipur | India Standard Time | -03:30 |
| Siena Likasi | Central Africa Time | 00:00 |
| Siena Luxor | Eastern European Time | 00:00 |
| Siena Ibagué | Colombia Time | 07:00 |
| Siena Shaoxing | China Time | -06:00 |
| Siena Ivanovo | Moscow Time | -01:00 |
| Siena Erzurum | Turkey Time | -01:00 |
| Siena Akure | West Africa Time | 01:00 |
| Siena Asyut | Eastern European Time | 00:00 |
| Siena Jambi | Western Indonesia Time | -05:00 |
| Siena Al Mansurah | Eastern European Time | 00:00 |
| Siena Oakland | Pacific Time | 09:00 |
| Siena Korba | India Standard Time | -03:30 |
| Siena Bokaro Steel City | India Standard Time | -03:30 |
| Siena San Juan | Atlantic Time | 06:00 |
| Siena Kolwezi | Central Africa Time | 00:00 |
| Siena Auckland | New Zealand Time | -11:00 |
| Siena Sukkur | Pakistan Time | -03:00 |
| Siena Mangaluru | India Standard Time | -03:30 |
| Siena Luohe | China Time | -06:00 |
| Siena Sebastopol | Simferopol Time | -01:00 |
| Siena Shymkent | East Kazakhstan Time | -04:00 |
| Siena Yangquan | China Time | -06:00 |
| Siena Magnitogorsk | Yekaterinburg Time | -03:00 |
| Siena Jhansi | India Standard Time | -03:30 |
| Siena Florianópolis | Brasilia Time | 05:00 |
| Siena Wandsbek | Central European Time | 00:00 |
| Siena Santos | Brasilia Time | 05:00 |
| Siena Maturín | Venezuela Time | 06:00 |
| Siena Minneapolis | Central Time | 07:00 |
| Siena Ardabil | Iran Time | -02:30 |
| Siena Nagasaki | Japan Time | -07:00 |
| Siena Chaoyang | China Time | -06:00 |
| Siena Gaza | Eastern European Time | -01:00 |
| Siena Kursk | Moscow Time | -01:00 |
| Siena Al Ain | Gulf Standard Time | -02:00 |
| Siena Jeju-si | Korean Time | -07:00 |
| Siena Panama City | Eastern Time | 07:00 |
| Siena Szczecin | Central European Time | 00:00 |
| Siena Biên Hòa | Indochina Time | -05:00 |
| Siena Villa Nueva | Central Time | 08:00 |
| Siena Ribeirão das Neves | Brasilia Time | 05:00 |
| Siena Hirakata | Japan Time | -07:00 |
| Siena Oujda | Western European Time | 02:00 |
| Siena Tanta | Eastern European Time | 00:00 |
| Siena Newcastle | South Africa Standard Time | 00:00 |
| Siena Xochimilco | Central Time | 08:00 |
| Siena Nellore | India Standard Time | -03:30 |