Iran Standard Time

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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 President 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 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 (Gaza Strip · West Bank) · 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.