| Current: | IRST — Iran Standard Time |
|---|---|
| Current Offset: | UTC/GMT +3:30 hours |
| Difference: | 8:30 hours ahead of Columbus |
2025 Time Zones - Posht Shahr
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The graph above shows that there is no clock change in Posht Shahr during 2025.
Note that Posht Shahr uses a special half-hour time zone.
Time Changes in Posht Shahr 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 — 2029 | No changes, UTC +3:30 hours all of the period | |||
| * All times are local Posht Shahr time. | ||||
Data for the years before 1970 is not available for Posht Shahr, however, we have earlier time zone history for Tehran available.
More Information
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Posht Shahr
Iran
2:4423am
Sunday, December 7, 2025