| Siena Prince Albert | South Africa Standard Time | -01:00 |
| Siena Clerques | Central European Time | 00:00 |
| Siena Reddihalli | India Standard Time | -04:30 |
| Siena Clervaux | Central European Time | 00:00 |
| Siena Redfern | Eastern Australia Time | -10:00 |
| Siena Clemson | Eastern Time | 05:00 |
| Siena Regensdorf | Central European Time | 00:00 |
| Siena Cleobury Mortimer | United Kingdom Time | 01:00 |
| Siena Regencós | Central European Time | 00:00 |
| Siena Clayton South | Eastern Australia Time | -10:00 |
| Siena Reeuwijk | Central European Time | 00:00 |
| Siena Clayton | Eastern Time | 05:00 |
| Siena Reedsport | Pacific Time | 08:00 |
| Siena Cle Elum | Pacific Time | 08:00 |
| Siena Redován | Central European Time | 00:00 |
| Siena Clear Lake | Central Time | 06:00 |
| Siena Redruth | United Kingdom Time | 01:00 |
| Siena Cayma District | Peru Time | 06:00 |
| Siena Phoenix | South Africa Standard Time | -01:00 |
| Siena Cazzago San Martino | Central European Time | 00:00 |
| Siena Phitsanulok | Indochina Time | -06:00 |
| Siena Castle Hills | Central Time | 06:00 |
| Siena Phraeksa | Indochina Time | -06:00 |
| Siena Cadiz | Central Time | 06:00 |
| Siena Phunphin | Indochina Time | -06:00 |
| Siena Cadereyta Jiménez | Central Time | 07:00 |
| Siena Pianezzo | Central European Time | 00:00 |
| Siena Cadalso | Central European Time | 00:00 |
| Siena Pianoro | Central European Time | 00:00 |
| Siena Cadalso de los Vidrios | Central European Time | 00:00 |
| Siena Prades | Central European Time | 00:00 |
| Siena Casula | Eastern Australia Time | -10:00 |
| Siena Pradines | Central European Time | 00:00 |
| Siena Castlerigg | United Kingdom Time | 01:00 |
| Siena Prachatice | Central European Time | 00:00 |
| Siena Castleisland | Ireland Time | 01:00 |
| Siena Prarostino | Central European Time | 00:00 |
| Siena Castlemaine | Eastern Australia Time | -10:00 |
| Siena Praiano | Central European Time | 00:00 |
| Siena Bradford-on-Tone | United Kingdom Time | 01:00 |
| Siena Prague | Central European Time | 00:00 |
| Siena Brahmavar | India Standard Time | -04:30 |
| Siena Prague | Central European Time | 00:00 |
| Siena Byford | Western Australia Time | -07:00 |
| Siena Prahran | Eastern Australia Time | -10:00 |
| Siena Byrdstown | Central Time | 06:00 |
| Siena Prai | Malaysia Time | -07:00 |
| Siena Byrnihat | India Standard Time | -04:30 |
| Siena Prai | Malaysia Time | -07:00 |
| Siena Byron | Eastern Time | 05:00 |