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Convert Iran Standard Time (IRST) to Greenwich Mean Time (GMT, UTC+0) for regional business calls. Free converter with real-time conversion, meeting time planner, and business hours comparison for IRST to GMT coordination. Includes 24-hour conversion table and live time displays. Perfect for international scheduling and global team collaboration. Works on all devices with accurate, reliable results.
Greenwich Mean Time is 3 hours and 30 minutes behind Iran Standard Time
Complete hourly conversion for Iran Standard Time to Greenwich Mean Time
| Iran Standard Time | Greenwich Mean Time | 24-Hour IRST | 24-Hour GMT |
|---|---|---|---|
| 12:00 AM | 8:30 PM (previous day) | 00:00 | 20:30 |
| 1:00 AM | 9:30 PM (previous day) | 01:00 | 21:30 |
| 2:00 AM | 10:30 PM (previous day) | 02:00 | 22:30 |
| 3:00 AM | 11:30 PM (previous day) | 03:00 | 23:30 |
| 4:00 AM | 12:30 AM | 04:00 | 00:30 |
| 5:00 AM | 1:30 AM | 05:00 | 01:30 |
| 6:00 AM | 2:30 AM | 06:00 | 02:30 |
| 7:00 AM | 3:30 AM | 07:00 | 03:30 |
| 8:00 AM | 4:30 AM | 08:00 | 04:30 |
| 9:00 AM | 5:30 AM | 09:00 | 05:30 |
| 10:00 AM | 6:30 AM | 10:00 | 06:30 |
| 11:00 AM | 7:30 AM | 11:00 | 07:30 |
| 12:00 PM | 8:30 AM | 12:00 | 08:30 |
| 1:00 PM | 9:30 AM | 13:00 | 09:30 |
| 2:00 PM | 10:30 AM | 14:00 | 10:30 |
| 3:00 PM | 11:30 AM | 15:00 | 11:30 |
| 4:00 PM | 12:30 PM | 16:00 | 12:30 |
| 5:00 PM | 1:30 PM | 17:00 | 13:30 |
| 6:00 PM | 2:30 PM | 18:00 | 14:30 |
| 7:00 PM | 3:30 PM | 19:00 | 15:30 |
| 8:00 PM | 4:30 PM | 20:00 | 16:30 |
| 9:00 PM | 5:30 PM | 21:00 | 17:30 |
| 10:00 PM | 6:30 PM | 22:00 | 18:30 |
| 11:00 PM | 7:30 PM | 23:00 | 19:30 |
Optimal hours for calls between IRST and GMT
Based on standard business hours (9:00 AM - 6:00 PM) in each time zone
Technical information for both time zones
Source timezone
Target timezone
Popular business hours conversion from Iran Standard Time to Greenwich Mean Time