| Tehran Rubano | Central European Time | 02:30 |
| Tehran Rozelle | Eastern Australia Time | -07:30 |
| Tehran Royersford | Eastern Time | 08:30 |
| Tehran Rozaje | Central European Time | 02:30 |
| Tehran San Juan de Miraflores | Peru Time | 08:30 |
| Tehran San Juan Bautista | Eastern Time | 08:30 |
| Tehran San Joaquín | Colombia Time | 08:30 |
| Tehran Sativali | India Standard Time | -02:00 |
| Tehran Sassenberg | Central European Time | 02:30 |
| Tehran Sassnitz | Central European Time | 02:30 |
| Tehran San Juan del Sur | Central Time | 09:30 |
| Tehran San Leone | Central European Time | 02:30 |
| Tehran Rothesay | United Kingdom Time | 03:30 |
| Tehran Rothesay | Atlantic Time | 07:30 |
| Tehran Röthlein | Central European Time | 02:30 |
| Tehran Rothschild | Central Time | 09:30 |
| Tehran Rothenburg ob der Tauber | Central European Time | 02:30 |
| Tehran Rostrenen | Central European Time | 02:30 |
| Tehran Rourkela | India Standard Time | -02:00 |
| Tehran Rouse Hill | Eastern Australia Time | -07:30 |
| Tehran Rougham | United Kingdom Time | 03:30 |
| Tehran Ram Nagar | India Standard Time | -02:00 |
| Tehran Rakovica | Central European Time | 02:30 |
| Tehran Rajosana | India Standard Time | -02:00 |
| Tehran Rajapalayam | India Standard Time | -02:00 |
| Tehran Radoľa | Central European Time | 02:30 |
| Tehran Radda in Chianti | Central European Time | 02:30 |
| Tehran Rạch Giá | Indochina Time | -03:30 |
| Tehran Pontresina | Central European Time | 02:30 |
| Tehran Rạch Giá | Indochina Time | -03:30 |
| Tehran Rahim Yar Khan | Pakistan Time | -01:30 |
| Tehran Rahovic | Central European Time | 02:30 |
| Tehran Raglan | New Zealand Time | -09:30 |
| Tehran Rafah | Eastern European Time | 01:30 |
| Tehran Raeford | Eastern Time | 08:30 |
| Tehran Raf Raf | Central European Time | 02:30 |
| Tehran Rainsville | Central Time | 09:30 |
| Tehran Rajadewali | Pakistan Time | -01:30 |