When it is 12:00 PM in Tehran, it is 9:30 PM the previous day in HST.
📞There is no overlap during standard 9-to-5 business hours, so a call may need to be early or late in the day for one side.
Tehran is 14 hours 30 minutes ahead of HST.
🕐 Subtract 14 hours 30 minutes from Tehran time to get HST time.
Tehran uses 4 hours 30 minutes ahead of Universal Time (UTC+4) and HST uses 10 hours behind Universal Time (UTC-1).
| Tehran Time | HST Time | |
|---|---|---|
| 12 AM Tehran Time | ↔ | 9 AM HST Time |
| 1 AM Tehran Time | ↔ | 10 AM HST Time |
| 2 AM Tehran Time | ↔ | 11 AM HST Time |
| 3 AM Tehran Time | ↔ | 12 PM HST Time |
| 4 AM Tehran Time | ↔ | 1 PM HST Time |
| 5 AM Tehran Time | ↔ | 2 PM HST Time |
| 6 AM Tehran Time | ↔ | 3 PM HST Time |
| 7 AM Tehran Time | ↔ | 4 PM HST Time |
| 8 AM Tehran Time | ↔ | 5 PM HST Time |
| 9 AM Tehran Time | ↔ | 6 PM HST Time |
| 10 AM Tehran Time | ↔ | 7 PM HST Time |
| 11 AM Tehran Time | ↔ | 8 PM HST Time |
| Tehran Time | HST Time | |
|---|---|---|
| 12 PM Tehran Time | ↔ | 9 PM HST Time |
| 1 PM Tehran Time | ↔ | 10 PM HST Time |
| 2 PM Tehran Time | ↔ | 11 PM HST Time |
| 3 PM Tehran Time | ↔ | 12 AM HST Time |
| 4 PM Tehran Time | ↔ | 1 AM HST Time |
| 5 PM Tehran Time | ↔ | 2 AM HST Time |
| 6 PM Tehran Time | ↔ | 3 AM HST Time |
| 7 PM Tehran Time | ↔ | 4 AM HST Time |
| 8 PM Tehran Time | ↔ | 5 AM HST Time |
| 9 PM Tehran Time | ↔ | 6 AM HST Time |
| 10 PM Tehran Time | ↔ | 7 AM HST Time |
| 11 PM Tehran Time | ↔ | 8 AM HST Time |
Tehran is 14 hours 30 minutes ahead of HST.
Tehran is ahead of HST by 14 hours 30 minutes.
It is 6:30 PM the previous day in HST.