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|Long Name:||Islamic Republic of Iran|
Time Zone Currently Being Used in Iran
|Offset||Time Zone Abbreviation & Name||Example City||Current Time|
|UTC +4:30||IRDT||Iran Daylight Time||Tehran||Sat, 3:59:55 pm|
The Iran Time Zone
Unlike most time zones, Iran has a half-hour offset instead of the usual full-hour offset: UTC+3:30 during standard time and UTC+4:30 during summer time.
IRST Time Zone Meridian
Iran bases its standard time specifically on the solar time at 52.5° east longitude, which runs about 400 km (250 miles) east of Tehran. The same meridian is used in the Persian Solar Hijri calendar, or Iranian calendar, to set the start of the year, known as Norooz.
DST Dates Based on the Sun
DST ends on 30 Shahrivar—the sixth month in the Solar Hijri calendar—equivalent to September 21 or 22 in the Gregorian calendar.
Time Zone Not Currently Being Observed in Iran
|Offset||Time Zone Abbreviation & Name||Commences|
|UTC +3:30||IRST||Iran Standard Time||Sep 21, 2022|
The above time zone is used during other parts of the year. It will become active again after the next clock change as Daylight Saving Time begins or ends.