Iran Standard Time Information & Iran Standard Time Links at HealthHaven.com

IRST is used in Iran.

Iran Standard Time (IRST) or Iran Time (IT) is the time zone used in Iran. Iran uses UTC+3:30. 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, on the decision of Mahmoud Ahmadinejad, Iran did not observe daylight saving time, called Iran Daylight Time (IRDT).^[1]^[2]

It was observed again from 2008-03-21, enforced by the Iranian Parliament.^{[citation needed]}

Iran has the zoneinfo time zone "Asia/Tehran".

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v • d • e Time offsets from Coordinated Universal Time (UTC)

−12 · −11 · −10 · −9:30 · −9 · −8 · −7 · −6 · −5 · −4:30 · −4 · −3:30 · −3 · −2:30 · −2 · −1 · −0:44 · −0:25 · UTC (0) · +0:20 · +0:30 · +1 · +2 · +3 · +3:30 · +4 · +4:30 · +4:51 · +5 · +5:30 · +5:40 · +5:45 · +6 · +6:30 · +7 · +7:20 · +7:30 · +8 · +8:30 · +8:45 · +9 · +9:30 · +10 · +10:30 · +11 · +11:30 · +12 · +12:45 · +13 · +13:45 · +14

Daylight saving time (DST) · Northern Hemisphere · Southern Hemisphere · Historical Only

v • d • e Time in Asia

Sovereign states	Afghanistan · Armenia¹ · Azerbaijan¹ · Bahrain · Bangladesh · Bhutan · Brunei · Burma² · Cambodia · People's Republic of China · Cyprus¹ · East Timor³ · Egypt⁴ · Georgia⁴ · India · Indonesia · Iran · Iraq · Israel · Japan · Jordan · Kazakhstan⁴ · North Korea · South Korea · Kuwait · Kyrgyzstan · Laos · Lebanon · Malaysia · Maldives · Mongolia · Nepal · Oman · Pakistan · Philippines · Qatar · Russia⁴ · Saudi Arabia · Singapore · Sri Lanka · Syria · Tajikistan · Republic of China⁵ · Thailand · Turkey⁴ · Turkmenistan · United Arab Emirates · Uzbekistan · Vietnam · Yemen

Dependencies, autonomies, other territories	Aceh · Adjara¹ · Abkhazia¹ · Akrotiri and Dhekelia · Altai · British Indian Ocean Territory · Buryatia · Christmas Island · Cocos (Keeling) Islands · Guangxi · Hong Kong · Inner Mongolia · Iraqi Kurdistan · Jakarta · Khakassia · Macau · Nagorno-Karabakh · Nakhchivan · Ningxia · Northern Cyprus · Palestine · Papua · Sakha · South Ossetia¹ · Tibet · Tuva · West Papua · Xinjiang · Yogyakarta

Italics indicates an unrecognised or partially recognised country. ¹ Sometimes included in Europe, depending on the border definitions. ² Officially known as Myanmar. ³ Sometimes included in Oceania, and also known as Timor-Leste. ⁴ Transcontinental country. ⁵ Commonly known as Taiwan.

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