| Current: | IRST — Iran Standard Time |
|---|---|
| Next Change: | IRDT — Iran Daylight Time |
| Current Offset: | UTC/GMT +3:30 hours |
| Difference: | 7:30 hours ahead of Washington DC |
2021 Time Zones - Tehran
Jan
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The graph above illustrates clock changes in Tehran during 2021.
Note that Tehran uses a special half-hour time zone.
Time Changes in Tehran Over the Years
Daylight Saving Time (DST) changes do not necessarily occur on the same date every year.
| Year | Date & Time | Abbreviation | Time Change | Offset After |
|---|---|---|---|---|
| 2020 | Sat, Mar 21 at 12:00 am | IRST → IRDT | +1 hour (DST start) | UTC+4:30h |
| Mon, Sep 21 at 12:00 am | IRDT → IRST | -1 hour (DST end) | UTC+3:30h | |
| 2021 | Mon, Mar 22 at 12:00 am | IRST → IRDT | +1 hour (DST start) | UTC+4:30h |
| Wed, Sep 22 at 12:00 am | IRDT → IRST | -1 hour (DST end) | UTC+3:30h | |
| 2022 | Tue, Mar 22 at 12:00 am | IRST → IRDT | +1 hour (DST start) | UTC+4:30h |
| Thu, Sep 22 at 12:00 am | IRDT → IRST | -1 hour (DST end) | UTC+3:30h | |
| 2023 | Wed, Mar 22 at 12:00 am | IRST → IRDT | +1 hour (DST start) | UTC+4:30h |
| Fri, Sep 22 at 12:00 am | IRDT → IRST | -1 hour (DST end) | UTC+3:30h | |
| 2024 | Thu, Mar 21 at 12:00 am | IRST → IRDT | +1 hour (DST start) | UTC+4:30h |
| Sat, Sep 21 at 12:00 am | IRDT → IRST | -1 hour (DST end) | UTC+3:30h | |
| * All times are local Tehran time. Next time change is highlighted. | ||||
More Information
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Tehran
Iran
8:4520pm
Tuesday, September 28, 2021