| Siena Hsinchu | Taipei Time | -06:00 |
| Siena Jixi | China Time | -06:00 |
| Siena Zanzibar | East Africa Time | -01:00 |
| Siena Tulsa | Central Time | 07:00 |
| Siena Taoyuan City | Taipei Time | -06:00 |
| Siena Tonalá | Central Time | 07:00 |
| Siena Kassala | Central Africa Time | 00:00 |
| Siena Palma | Central European Time | 00:00 |
| Siena Kitwe | Central Africa Time | 00:00 |
| Siena Nasiriyah | Arabian Time | -01:00 |
| Siena Tver | Moscow Time | -01:00 |
| Siena West Jerusalem | Israel Time | -01:00 |
| Siena Machida | Japan Time | -07:00 |
| Siena Yangjiang | China Time | -06:00 |
| Siena Khmelnytskyi | Eastern European Time | -01:00 |
| Siena Gifu | Japan Time | -07:00 |
| Siena Tiruppur | India Standard Time | -03:30 |
| Siena Keelung | Taipei Time | -06:00 |
| Siena El Hoceima | Western European Time | 01:00 |
| Siena Manchester | United Kingdom Time | 01:00 |
| Siena Surrey | Pacific Time | 09:00 |
| Siena Vila Velha | Brasilia Time | 05:00 |
| Siena Weifang | China Time | -06:00 |
| Siena Fujisawa | Japan Time | -07:00 |
| Siena Ndola | Central Africa Time | 00:00 |
| Siena Kollam | India Standard Time | -03:30 |
| Siena Serra | Brasilia Time | 05:00 |
| Siena Samsun | Turkey Time | -01:00 |
| Siena Tallinn | Eastern European Time | -01:00 |
| Siena Bamenda | West Africa Time | 01:00 |
| Siena El Obeid | Central Africa Time | 00:00 |
| Siena Bello | Colombia Time | 07:00 |
| Siena Xinpu | China Time | -06:00 |
| Siena Sandakan | Malaysia Time | -06:00 |
| Siena Buraydah | Arabian Time | -01:00 |
| Siena Kandahar | Afghanistan Time | -02:30 |
| Siena Diadema | Brasilia Time | 05:00 |
| Siena Wichita | Central Time | 07:00 |
| Siena New Orleans | Central Time | 07:00 |
| Siena Comilla | Bangladesh Time | -04:00 |
| Siena Samut Prakan | Indochina Time | -05:00 |
| Siena Nampula | Central Africa Time | 00:00 |
| Siena Arlington | Central Time | 07:00 |
| Siena Cleveland | Eastern Time | 06:00 |
| Siena Bissau | Greenwich Mean Time | 02:00 |
| Siena Iloilo City | Philippine Time | -06:00 |
| Siena Khamis Mushait | Arabian Time | -01:00 |
| Siena Campos | Brasilia Time | 05:00 |
| Siena Resistencia | Argentina Time | 05:00 |
| Siena Misrata | Eastern European Time | 00:00 |