| Preston Rapperswil-Jona | Central European Time | -06:00 |
| Preston Rapid Creek | Central Australia Time | -13:30 |
| Preston Raniapur | India Standard Time | -09:30 |
| Preston Ranelagh | Eastern Australia Time | -14:00 |
| Preston Rancho Santa Fe | Pacific Time | 03:00 |
| Preston Randburg | South Africa Standard Time | -06:00 |
| Preston Randburg | South Africa Standard Time | -06:00 |
| Preston Ranakpur | India Standard Time | -09:30 |
| Preston Rampur Devrai | India Standard Time | -09:30 |
| Preston Ramsey | Eastern Time | 00:00 |
| Preston Ramstein-Miesenbach | Central European Time | -06:00 |
| Preston Ramuscello | Central European Time | -06:00 |
| Preston Ramona | Pacific Time | 03:00 |
| Preston Ramingstein | Central European Time | -06:00 |
| Preston Phunphin | Indochina Time | -11:00 |
| Preston Pianezzo | Central European Time | -06:00 |
| Preston Pianoro | Central European Time | -06:00 |
| Preston Ramadan | Uzbekistan Time | -09:00 |
| Preston Ramanathapuram | India Standard Time | -09:30 |
| Preston Ramanattukara | India Standard Time | -09:30 |
| Preston Rambukkana | India Standard Time | -09:30 |
| Preston Phato | Indochina Time | -11:00 |
| Preston Phang Khon | Indochina Time | -11:00 |
| Preston Philo | Pacific Time | 03:00 |
| Preston Philomath | Pacific Time | 03:00 |
| Preston Philipsburg | Mountain Time | 02:00 |
| Preston Philipsburg | Atlantic Time | 00:00 |
| Preston Phitsanulok | Indochina Time | -11:00 |
| Preston Phoenix | South Africa Standard Time | -06:00 |
| Preston Phraeksa | Indochina Time | -11:00 |
| Preston Pewaukee | Central Time | 01:00 |
| Preston Peyia | Eastern European Time | -07:00 |
| Preston Pezinok | Central European Time | -06:00 |
| Preston Pfäffikon | Central European Time | -06:00 |
| Preston Pfalzgrafenweiler | Central European Time | -06:00 |
| Preston Pfarrkirchen | Central European Time | -06:00 |
| Preston Pettendorf | Central European Time | -06:00 |
| Preston Pha Sing | Indochina Time | -11:00 |