IRST to RET Converter
Quick answers
Selected conversion
3:30 pm15:30 IRST (UTC+3:30), Oct 3, 2026 = 4:00 pm16:00 RET (UTC+4), Oct 3, 2026
IRST is 30 minutes behind RET.
IRST and RET examples
These examples always use IRST (UTC+3:30) and RET (UTC+4). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
IRST is 30 minutes behind RET.
How the time difference changes
IRST is 30 minutes behind RET year-round.
Working hours of 9:00 am to 5:00 pm in IRST correspond to 9:30 am to 5:30 pm in RET.Working hours of 09:00 to 17:00 in IRST correspond to 09:30 to 17:30 in RET.
Compare IRST time with RET time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Iran Standard Time is 30 minutes behind Reunion Time.
3:30 pm15:30 in IRST is 4:00 pm16:00 in RET
IRST to RET call time
Best time for a conference call or a meeting is between 9am-4:30pm09:00-16:30 in IRST which corresponds to 9:30am-5pm09:30-17:00 in RET
3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
4:00 pm16:00 Reunion Time (RET). Offset UTC +4:00 hours
3:30 pm15:30 IRST / 4:00 pm16:00 RET
| IRST | RET |
|---|---|
| 12:00am | 12:30am |
| 1:00am | 1:30am |
| 2:00am | 2:30am |
| 3:00am | 3:30am |
| 4:00am | 4:30am |
| 5:00am | 5:30am |
| 6:00am | 6:30am |
| 7:00am | 7:30am |
| 8:00am | 8:30am |
| 9:00am | 9:30am |
| 10:00am | 10:30am |
| 11:00am | 11:30am |
| 12:00pm | 12:30pm |
| 1:00pm | 1:30pm |
| 2:00pm | 2:30pm |
| 3:00pm | 3:30pm |
| 4:00pm | 4:30pm |
| 5:00pm | 5:30pm |
| 6:00pm | 6:30pm |
| 7:00pm | 7:30pm |
| 8:00pm | 8:30pm |
| 9:00pm | 9:30pm |
| 10:00pm | 10:30pm |
| 11:00pm | 11:30pm |
| 00:00 | 00:30 |
| 01:00 | 01:30 |
| 02:00 | 02:30 |
| 03:00 | 03:30 |
| 04:00 | 04:30 |
| 05:00 | 05:30 |
| 06:00 | 06:30 |
| 07:00 | 07:30 |
| 08:00 | 08:30 |
| 09:00 | 09:30 |
| 10:00 | 10:30 |
| 11:00 | 11:30 |
| 12:00 | 12:30 |
| 13:00 | 13:30 |
| 14:00 | 14:30 |
| 15:00 | 15:30 |
| 16:00 | 16:30 |
| 17:00 | 17:30 |
| 18:00 | 18:30 |
| 19:00 | 19:30 |
| 20:00 | 20:30 |
| 21:00 | 21:30 |
| 22:00 | 22:30 |
| 23:00 | 23:30 |
Iran Standard Time
Offset: IRST is 3 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: Iran
Principal Cities: The largest city in the IRST time zone is Tehran in Iran, with about 7.153 million people. Other major cities in this time zone include Mashhad, Isfahan, Karaj, Tabriz.
Daylight Saving: Clocks in Iran Standard Time (IRST) do not change for daylight saving time, so IRST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
IRST representations, usage and related time zones
- +0330 - basic
- +03:30 - extended
- +0330 - sign character (+) followed by a four digit time providing hours (03) and minutes (30) of the offset. Indicates an offset of three hours and thirty minutes to the east of the zero meridian.
Reunion Time
Offset: RET is 4 hours ahead Greenwich Mean Time (GMT) and is used in Africa
Countries using this time zone: Réunion
Principal Cities: The largest city in the RET time zone is Saint Denis in Reunion, with about 154,765 people. Other major cities in this time zone include Saint Paul, Saint Pierre, Le Tampon, Saint Andre.
Daylight Saving: Clocks in Reunion Time (RET) do not change for daylight saving time, so RET stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
RET representations, usage and related time zones
- +04 - basic short
- +0400 - basic
- +04:00 - extended
- +0400 - sign character (+) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the east of the zero meridian.
- Delta - Military abbreviation for RET
- D - short form of 'Delta'
- KUYT - Kuybyshev Time
- MSD - Moscow Daylight Time
- SAMT - Samara Time
- AMT - Armenia Time
- AZT - Azerbaijan Time
- D - Delta Time Zone
- GET - Georgia Standard Time
- GST - Gulf Standard Time
- MUT - Mauritius Time
- RET - Reunion Time
- SCT - Seychelles Time