Best Time to Call Iran: A Time Zone and Business Hours Guide

98 is Iran's country code, assigned by the ITU. Tehran's area code is 21.

Iran uses a half-hour time zone offset (UTC+3:30), one of a genuine handful in the world — chosen because it keeps solar noon close to 12:00 PM given Tehran's longitude, splitting the difference between the neighboring UTC+3 and UTC+4 zones.

Iran's workweek runs Saturday through Wednesday, with Thursday and Friday as the weekend (Friday being the Islamic holy day) — a 'Thursday call' that's routine in much of the West falls on Iran's weekend.

Iran observes Iran Standard Time (IRST), UTC+3:30, shifting to Iran Daylight Time (IRDT), UTC+4:30, for a period centered on Nowruz (the Persian New Year) rather than a fixed Gregorian date.

Because Iran's DST transition dates don't align with the US or UK schedule, the exact gap can shift by up to an hour during the mismatch windows each spring and fall.

Iran's business day (roughly 8:00 AM–4:00 PM local, Saturday-Wednesday) lands in the very early morning on the US East Coast given the 8h30m gap.

UK and Europe-based callers get a reasonably workable mid-morning window. US callers need to plan for very early morning or overnight, and must remember Iran's business week runs Saturday-Wednesday, not Monday-Friday.

Standard Iranian business hours run Saturday to Wednesday, roughly 8:00 AM–4:00 PM local, with Thursday and Friday as the weekend.

Iran's economy centers on oil and gas, petrochemicals, agriculture, and a substantial domestic manufacturing base.

Never assume a Western Monday-Friday week — a call planned for 'Thursday' in the Western sense falls on Iran's weekend.

Aim for Sunday through Tuesday, the middle of Iran's Saturday-Wednesday workweek.

Nowruz (March 20-23) is by far the most significant scheduling event — the Persian New Year effectively shuts down Iranian business nationwide, with many people extending travel well beyond the official dates, similar to Lunar New Year in East Asia.

Numerous Shia religious observances (Imam birthdays and martyrdoms, Tasua and Ashura, Arbaeen) fall on the Islamic lunar calendar and shift annually — check the current year's calendar before scheduling around these dates.

On these dates, most Iranian government offices and businesses are closed. Islamic lunar-calendar dates are estimated until confirmed closer to each date.

• Anniversary of the Islamic Revolution — Wednesday, 11 February 2026
• Nowruz (Iranian New Year) — Friday 20 – Monday 23 March 2026 · most significant holiday period of the year
• Islamic Republic Day — Wednesday, 1 April 2026
• Sizdah Be-dar (Nature Day) — Sunday, 1 April 2026 · 13th day after Nowruz
• Eid al-Fitr — Friday, 20 March 2026 · estimated, marks the end of Ramadan
• Eid al-Adha — Wednesday, 27 May 2026 · estimated
• Tasua and Ashura — Variable · estimated, significant Shia mourning observances
• Arbaeen — Variable · estimated, 40 days after Ashura

Nowruz deserves the most scheduling attention — the multi-day holiday period shuts down Iranian business activity nationwide and many people extend personal travel well beyond the official dates. Shia religious observances shift annually on the Islamic lunar calendar and should be verified against the current year's calendar.

Persian (Farsi) is the official language; English is common in business and trade contexts.

Business culture values formality, patience, and relationship-building before getting to substantive discussion.

Given Iran's complex political and international context, calls are generally best kept focused on factual business scheduling.

• Assuming a Monday-Friday workweek. Iran's business week runs Saturday-Wednesday, with Thursday and Friday as the weekend.
• Forgetting the half-hour offset. Iran's UTC+3:30 (and UTC+4:30 in DST) means simple whole-hour math will be off by 30 minutes.
• Scheduling around Nowruz without checking. The Persian New Year period effectively halts Iranian business for well over a week in practice.
• Assuming Iran's DST dates match a fixed Gregorian schedule. They're tied to the Solar Hijri calendar and shift slightly year to year.

The simplest way to stay inside the right window is to block a standing early-morning US Eastern slot — roughly midnight–7:30 AM ET — as your recurring Iran call time, Sunday through Tuesday.

A local Iran +98 virtual number helps too: a familiar +98 caller ID reads as local rather than an unfamiliar international string. My Country Mobile provisions +98 virtual numbers that route to any device or team, worldwide, backed by a network reaching 190+ countries with 99.99% uptime.