| Siena Zaporizhia | Eastern European Time | -01:00 |
| Siena Marseille | Central European Time | 00:00 |
| Siena Al Zarqa | Eastern European Time | -02:00 |
| Siena Çankaya | Turkey Time | -02:00 |
| Siena Boumerdas | Central European Time | 00:00 |
| Siena Jalandhar | India Standard Time | -04:30 |
| Siena Thiruvananthapuram | India Standard Time | -04:30 |
| Siena Sakai | Japan Time | -08:00 |
| Siena Anyang | China Time | -07:00 |
| Siena San Miguel de Tucuman | Argentina Time | 04:00 |
| Siena Cotonou | West Africa Time | 00:00 |
| Siena Salem | India Standard Time | -04:30 |
| Siena Tiruchirappalli | India Standard Time | -04:30 |
| Siena Homs | Eastern European Time | -01:00 |
| Siena Hohhot | China Time | -07:00 |
| Siena Niamey | West Africa Time | 00:00 |
| Siena Tainan City | Taipei Time | -07:00 |
| Siena Shangyu | China Time | -07:00 |
| Siena Łódź | Central European Time | 00:00 |
| Siena Dammam | Arabian Time | -02:00 |
| Siena Xining | China Time | -07:00 |
| Siena Kahrīz | Iran Time | -03:30 |
| Siena Kota | India Standard Time | -04:30 |
| Siena Natal | Brasilia Time | 04:00 |
| Siena Bhubaneshwar | India Standard Time | -04:30 |
| Siena Qinhuangdao | China Time | -07:00 |
| Siena Hengyang | China Time | -07:00 |
| Siena Antalya | Turkey Time | -02:00 |
| Siena Kraków | Central European Time | 00:00 |
| Siena Aligarh | India Standard Time | -04:30 |
| Siena Da Nang | Indochina Time | -06:00 |
| Siena Pietermaritzburg | South Africa Standard Time | -01:00 |
| Siena Lomé | Greenwich Mean Time | 01:00 |
| Siena Trujillo | Peru Time | 06:00 |
| Siena Malang | Western Indonesia Time | -06:00 |
| Siena Ciudad Guayana | Venezuela Time | 05:00 |
| Siena Bareilly | India Standard Time | -04:30 |
| Siena Kigali | Central Africa Time | -01:00 |
| Siena Teresina | Brasilia Time | 04:00 |
| Siena Xinxiang | China Time | -07:00 |
| Siena São Bernardo do Campo | Brasilia Time | 04:00 |
| Siena Hegang | China Time | -07:00 |
| Siena Rīga | Eastern European Time | -01:00 |
| Siena Amsterdam | Central European Time | 00:00 |
| Siena Oyo | West Africa Time | 00:00 |
| Siena Quetta | Pakistan Time | -04:00 |
| Siena Nottingham | United Kingdom Time | 01:00 |
| Siena Campo Grande | Amazon Time | 05:00 |
| Siena Ashgabat | Turkmenistan Time | -04:00 |
| Siena Álvaro Obregón | Central Time | 07:00 |