| Siena Kut | Arabian Time | -01:00 |
| Siena Timișoara | Eastern European Time | -01:00 |
| Siena Vologda | Moscow Time | -01:00 |
| Siena Şişli | Turkey Time | -01:00 |
| Siena Lexington-Fayette | Eastern Time | 06:00 |
| Siena Hull | United Kingdom Time | 01:00 |
| Siena Soacha | Colombia Time | 07:00 |
| Siena Coacalco | Central Time | 07:00 |
| Siena Preston | United Kingdom Time | 01:00 |
| Siena Ganja | Azerbaijan Time | -02:00 |
| Siena Lianshan | China Time | -06:00 |
| Siena Denizli | Turkey Time | -01:00 |
| Siena Ikeja | West Africa Time | 01:00 |
| Siena Bonn | Central European Time | 00:00 |
| Siena Ostrava | Central European Time | 00:00 |
| Siena Varna | Eastern European Time | -01:00 |
| Siena Vitoria | Brasilia Time | 05:00 |
| Siena Tongling | China Time | -06:00 |
| Siena Iligan City | Philippine Time | -06:00 |
| Siena Cusco | Peru Time | 07:00 |
| Siena Maringá | Brasilia Time | 05:00 |
| Siena Miyazaki | Japan Time | -07:00 |
| Siena Percut | Western Indonesia Time | -05:00 |
| Siena Pucallpa | Peru Time | 07:00 |
| Siena Jingdezhen | China Time | -06:00 |
| Siena Guarujá | Brasilia Time | 05:00 |
| Siena Sariwŏn | Pyongyang Time | -07:00 |
| Siena Vladimir | Moscow Time | -01:00 |
| Siena Antofagasta | Chile Time | 06:00 |
| Siena Botshabelo | South Africa Standard Time | 00:00 |
| Siena Bengkulu | Western Indonesia Time | -05:00 |
| Siena Butuan City | Philippine Time | -06:00 |
| Siena Tampico | Central Time | 07:00 |
| Siena Chita | Chita Time | -07:00 |
| Siena Newcastle | Eastern Australia Time | -08:00 |
| Siena Valledupar | Colombia Time | 07:00 |
| Siena General Escobedo | Central Time | 07:00 |
| Siena Biskra | Central European Time | 01:00 |
| Siena Mannheim | Central European Time | 00:00 |
| Siena Chernihiv | Eastern European Time | -01:00 |
| Siena Irbid | Eastern European Time | -01:00 |
| Siena Tumakur | India Standard Time | -03:30 |
| Siena Jinju | Korean Time | -07:00 |
| Siena Newport | United Kingdom Time | 01:00 |
| Siena Tawau | Malaysia Time | -06:00 |
| Siena Dongying | China Time | -06:00 |
| Siena Firozabad | India Standard Time | -03:30 |
| Siena Al Fayyum | Eastern European Time | 00:00 |
| Siena Porto Velho | Amazon Time | 06:00 |
| Siena Celaya | Central Time | 07:00 |