Time in BST and IRDT
The time difference between British Summer Time (BST) and Iran Daylight Time (IRDT) is 3 hours 30 minutes. Iran Daylight Time is 3 hours 30 minutes ahead of British Summer Time.
This means 9am BST is 12:30pm IRDT and 5pm BST is 8:30pm IRDT.
British Summer Time
- The current local time in BST is 2:11 pm (July 3, 2026)
- BST time zone offset is UTC+01:00
Iran Daylight Time
- The current local time in IRDT is 5:41 pm (July 3, 2026)
- IRDT time zone offset is UTC+04:30
How to convert British Summer Time to Iran Daylight Time?
Add 3 hours 30 minutes to British Summer Time to get Iran Daylight Time.
Time in BST
00:00
Time in IRDT
00:00
Use the slider above to convert British Summer Time to Iran Daylight Time and view the day and night map at different times.
Day–night colors on the map:
Day
Civil twilight
Nautical twilight
Astronomical twilight
NightTime Conversion Chart
| BST | IRDT |
|---|---|
| 12am | 3:30am |
| 1am | 4:30am |
| 2am | 5:30am |
| 3am | 6:30am |
| 4am | 7:30am |
| 5am | 8:30am |
| 6am | 9:30am |
| 7am | 10:30am |
| 8am | 11:30am |
| 9am | 12:30pm |
| 10am | 1:30pm |
| 11am | 2:30pm |
| 12pm | 3:30pm |
| 1pm | 4:30pm |
| 2pm | 5:30pm |
| 3pm | 6:30pm |
| 4pm | 7:30pm |
| 5pm | 8:30pm |
| 6pm | 9:30pm |
| 7pm | 10:30pm |
| 8pm | 11:30pm |
| 9pm | 0:30am |
| 10pm | 1:30am |
| 11pm | 2:30am |