Current Time in Tehran, Iran

Tehran follows the IRST/IRDT time zone, which is GMT+3:30 relative to Coordinated Universal Time (UTC). Tehran does not observe Daylight Saving Time (DST). The clock stays at IRST/IRDT (GMT+3:30) year-round, making it simpler to coordinate across time zones. The IANA timezone identifier for Tehran is `Asia/Tehran`, which is the internationally standardized reference used by operating systems, programming languages, and scheduling software worldwide.

To convert the current time in Tehran to another city, simply note the UTC offset (GMT+3:30) and calculate the difference. For example, if Tehran is at GMT+3:30 and New York is at UTC-5, the difference is straightforward arithmetic. Our World Clock tool lets you compare Tehran side-by-side with any other city in the world — no math needed.

Unlike static converters that show a snapshot, our live clock for Tehran updates every second in real time. This is especially useful for: (1) Scheduling calls across time zones — see the exact moment in Tehran before you dial. (2) Remote teams — if your colleagues are in Tehran, always know if it's their working hours. (3) Travel planning — arrive prepared by tracking local time in Tehran before your flight.

• Country: Iran 🇮🇷 • Timezone Abbreviation: IRST/IRDT • UTC Offset: GMT+3:30 • IANA Identifier: Asia/Tehran • Observes DST: No These details are pulled from the IANA Time Zone Database, the same source used by Apple, Google, and Microsoft for their system clocks.

Here is how Tehran (GMT+3:30) compares to the world's three major business hubs: • vs. New York: Tehran is 7 hours 30 minutes ahead of New York. • vs. London: Tehran is 2 hours 30 minutes ahead of London. • vs. Tokyo: Tehran is 5 hours 30 minutes behind Tokyo. Note: These differences may shift slightly when Daylight Saving Time changes occur in any of these cities. Always confirm with a live clock when scheduling time-sensitive events.

If you're scheduling a call or meeting with someone in Tehran from abroad, here are the optimal windows: • From the US (New York, ET): 4.5:00 PM–0.5:00 AM (when New York (ET) is 9 AM–5 PM) local Tehran time. • From the UK (London, GMT/BST): 11.5:00 AM–7.5:00 PM (when London (GMT/BST) is 9 AM–5 PM) local Tehran time. These windows align with standard 9 AM–5 PM business hours in the caller's location. Adjust for your specific team's working hours as needed.