What Time Zone Is Iran In?
Iran uses a single timezone: the primary designation is Asia/Tehran, which is currently UTC+03:30 from Coordinated Universal Time. The IANA Time Zone Database , the authoritative global reference used by operating systems, web services, and programming languages worldwide, lists this as Asia/Tehran.
Regional Context
South Asia's timezone configuration features the most fractured offsets globally. India (UTC+05:30) uses a single national timezone covering 3,287,263 km², its half-hour offset dates to 1906. Pakistan (UTC+05:00) sits one hour behind India despite sharing a border. Nepal (UTC+05:45) is 15 minutes ahead of India and 45 minutes ahead of Pakistan, a deliberate assertion of distinct national timekeeping since 1986. Bangladesh (UTC+06:00), Sri Lanka (UTC+05:30, same as India), Bhutan (UTC+06:00), and the Maldives (UTC+05:00) complete the picture. Afghanistan (UTC+04:30) bridges South Asia and the Middle East. No Southern Asian country currently observes Daylight Saving Time. The cumulative effect: traveling from Kabul (UTC+04:30) to Dhaka (UTC+06:00) crosses three different UTC offsets, with two of them using 30-minute increments.
Current Time in Tehran
The capital city Tehran observes the Asia/Tehran timezone, currently at UTC+03:30. The live clock above updates every second using your browser's Intl.DateTimeFormat API with the IANA zone identifier. To convert Tehran time to UTC, subtract the offset shown: Tehran's local time minus 03:30 hours equals UTC.
Daylight Saving Time in Iran
The DST status for Iran is shown in the indicator above. When DST is in effect, clocks advance by one hour, temporarily shifting Iran's UTC offset by +1. Countries that do not observe DST, including Japan, China, India, and most of Africa, maintain a fixed offset year-round. The IANA Time Zone Database contains the complete historical record of DST transitions for Asia/Tehran, including past rule changes and future scheduled transitions.
Scheduling Calls With Iran
When arranging calls or meetings with contacts in Iran, standard business hours run 09:00 to 18:00 local time (Asia/Tehran). In UTC, that window is 05:45 to 14:45 UTC. The time difference tool on this site calculates the overlap between any two cities' business hours, so you can find the shared window without mental arithmetic. If you're in a different country, visit the time difference page for your city vs. Tehranfor a full hour-by-hour breakdown.
Timezone Abbreviation for Iran
The GMT+3:30 abbreviation appears on airline tickets, broadcast schedules, and financial contracts when referencing Iran time. Timezone abbreviations are not globally unique, IST, for example, can mean India Standard Time (UTC+05:30), Irish Standard Time (UTC+01:00), or Israel Standard Time (UTC+02:00). The IANA identifier Asia/Tehran is unambiguous: it maps to exactly one timezone in the world. When writing times for a global audience, always include both the abbreviation and the UTC offset to prevent misreading. The IANA Time Zone Database records every past and future rule change for Asia/Tehran, making it the only reliable reference for historical time conversions.
Calling Iran from Abroad
International callers reach Iran using the code +98. Standard business hours run 09:00 to 18:00 local (Asia/Tehran), which in UTC is 05:45 to 14:45 UTC. The best window for international calls is 10:00 to 16:00 Iran local time, after the morning rush and before post-17:00 wind-down. Mobile coverage in Tehran follows local carrier standards. International roaming calls to Iran are billed at the caller's international rate, not the local Iran rate.
Currency and Banking Hours in Iran
Domestic banks in Tehran operate on Asia/Tehran time. Wire transfers, invoice settlements, and currency conversions must typically be initiated before 17:00 Iran local time to be processed same-day. The forex market trades 24 hours, but domestic banking settlement in Iran follows Asia/Tehran business hours. When sending international transfers to Iran, factor in the UTC offset (UTC+03:30) to ensure your instruction arrives before the local cut-off time. Same-day settlement typically requires initiation before 11:45 UTC.
Iran: A Single-Zone Country
Iran observes a single timezone nationwide: Asia/Tehran (UTC+03:30). Single-zone countries have a scheduling advantage, there is no ambiguity about which zone a meeting time refers to, and businesses across the country share the same clock. This simplifies domestic commerce, broadcast scheduling, and government coordination.