Iran Standard Time

Iran Standard Time (IRST) or Iran Time (IT) is the time zone used in Iran. Iran uses a UTC offset UTC+03:30. IRST 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 (DST) (called Iran Daylight Time or IRDT).^[1] It was reintroduced from 21 March 2008. On 21 September 2022, Iran abolished DST and now observes standard time year-round.^[2]^[3]

^ "Time zone and daylight saving time for Iran – Tehran between 2010 and 2019". Timeanddate.com. Retrieved 9 May 2010.
^ "Iran Considers Abolishing DST". timeanddate.com. Retrieved 13 May 2022.
^ "Daylight Saving Time Ends in Iran". Livingintehran.com. 2022-09-21.

[1] "Time zone and daylight saving time for Iran – Tehran between 2010 and 2019". Timeanddate.com. Retrieved 9 May 2010.

[2] "Iran Considers Abolishing DST". timeanddate.com. Retrieved 13 May 2022.

[3] "Daylight Saving Time Ends in Iran". Livingintehran.com. 2022-09-21.

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	UTC+02:00 UTC+03:00	Eastern European Time / Israel Standard Time / Eastern European Summer Time / Israel Summer Time
	UTC+03:00	Arabia Standard Time / Turkey Time
	UTC+03:30	Iran Standard Time
	UTC+04:00	Gulf Standard Time