What is Standard Iran Time?
You need to keep in mind that Standard Iran Time zone is an identifier for a time offset that is 3:30 hours ahead of the
UTC time zone.
This time pattern is maintained using highly accurate atomic clocks matched to the Earth's rotation.
In this section, you will learn key facts about this time zone and stay well informed.
The IANA time zone identifier used is Asia/Tehran.
Please be aware that
Daylight Saving Time (DST) is not used in this time zone.
During the summer, clocks go forward one hour to the
UTC+4:30 offset and
Iran Daylight Time is used.
The dates of DST transitions in Iran are based on the Solar Hijri calendar, the official calendar of Iran, which is in turn based on the March equinox as determined by astronomical calculation at the meridian for Iran Standard Time.
This results in the unusual situation wherein the dates of DST transitions don't fall on the same weekday each year as they do in most other countries.
About Standard Iran Time
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Time Offset: UTC+3:30, UTC+03:30
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Abbreviation: IRST Time, Iran Standard Time, IT Time, Iran Time
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Standard Time Ends: On 1 Farvardin, which corresponds to either 20 or 21 March (clocks go forward one hour).
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Standard Time Began: On 30 Shahrivar, which corresponds to either 20 or 21 September (clocks went back one hour).
Standard Iran Time Zone Map
This time zone is a time offset that adds 3:30 hours to
Coordinated Universal Time (UTC).
In the map above we highlight the entire region covered by this time zone.
Its main cities and territories are:
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Tehran
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Mashhad
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Isfahan
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Tabriz
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Karaj
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Shiraz
In the map above we highlight the entire region covered by the time zone.
This time offset is also observed during standard time and daylight saving time for various geographic regions.
You need to be very careful finding these time zones that may have different names and abbreviations, but have the same UTC offset:
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Iran Time
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IRST Time
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IT Time
Main Countries
This time zone is used in the following country:
In Iran, this time zone is used throughout the country.
This time zone is defined by the 52.5 degrees east meridian, the same meridian which defines the Iranian calendar and is the official meridian of Iran.
Between 2005 and 2008, by decree of President Mahmoud Ahmadinejad, Iran did not observe daylight saving time.
It was reintroduced from 21 March 2008.
Current Iran Standard Time with seconds according to the official atomic clock.
