Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

UTC to Tehran

+3h 30m

UTC

UTCSOURCE

UTC+00:00

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Tehran

IRST

Iran · UTC+03:30

HH03

MM30

15:30 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

UTC

Tehran

12:00 AM

3:30 AM

2:00 AM

5:30 AM

4:00 AM

7:30 AM

6:00 AM

9:30 AM

8:00 AM

11:30 AM

10:00 AM

1:30 PM

12:00 PM

3:30 PM

2:00 PM

5:30 PM

4:00 PM

7:30 PM

6:00 PM

9:30 PM

8:00 PM

11:30 PM

10:00 PM

1:30 AM+1

Green rows indicate typical business hours (9 AM - 5 PM)

UTC and IRST on the World Map

The map below highlights the UTC (Coordinated Universal Time) and IRST (Iran Standard Time) timezone regions across the globe.

UTC Zone

→

IRST Zone

Explore all world timezones interactively →

UTC – Coordinated Universal Time

UTC+00:00

Coordinated Universal Time (UTC) is the world's primary time standard, used as the basis for civil time worldwide.

Countries in UTC

Used worldwide as referenceSame zone as: UK, Ireland, Iceland, Portugal, Ghana

Major Cities in UTC

LondonDublinReykjavikAccraLisbonDakar

Key Facts about UTC

•UTC is the basis for all civil time zones worldwide.
•The abbreviation 'UTC' is a compromise between English (CUT) and French (TUC).
•UTC is based on atomic clocks and is accurate to within a nanosecond per day.
•Servers and databases worldwide store timestamps in UTC to avoid timezone confusion.
•Leap seconds are occasionally added to UTC to keep it aligned with Earth's rotation.

Daylight Saving:No – UTC+00:00 year-round

Learn more about UTC on Wikipedia

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

UTC vs Tehran: Offsets, DST and Best Call Times

UTC runs on Coordinated Universal Time (UTC) at UTC+00:00. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts UTC 3 hours 30 minutes ahead of Tehran — a difference of +3h 30m at the current offsets.

In practice, when it is 9:00 AM in UTC it is 12:30 PM in Tehran. Midnight in UTC is 3:30 AM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.

UTC to Tehran time conversion table

UTC (UTC)	Tehran (IRST)	Day
12:00 AM	3:30 AM	same day
6:00 AM	9:30 AM	same day
7:00 AM	10:30 AM	same day
8:00 AM	11:30 AM	same day
9:00 AM	12:30 PM	same day
12:00 PM	3:30 PM	same day
3:00 PM	6:30 PM	same day
5:00 PM	8:30 PM	same day
6:00 PM	9:30 PM	same day
9:00 PM	12:30 AM	next day

Why people convert UTC to Tehran time

Scheduling a call from UTC to Tehran: a 10:00 AM start in UTC lands at 1:30 PM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both UTC and Tehran are inside the 9-to-5 working day between 9:00 AM and 1:30 PM UTC time (12:30 PM–5:00 PM IRST). That is roughly 4 hours 30 minutes of usable overlap.
Watching a live event or market open: UTC viewers need 12:30 PM in Tehran to catch a 9:00 AM start there, and 8:30 PM if the event is anchored to UTC.

Always state the zone abbreviation, not just the hour. "3:00 PM UTC" is unambiguous; "3 PM" across a +3h 30m gap is not.
Block 9:00 AM–1:30 PM UTC as the recurring meeting window if you work primarily from UTC and need Tehran colleagues present.

About UTC (Coordinated Universal Time)

Coordinated Universal Time (UTC) is the primary time standard by which the world regulates clocks and time. It is effectively the successor to GMT and is based on International Atomic Time with leap seconds added to keep it synchronized with Earth's rotation. UTC is used in aviation, computing, navigation, weather forecasting, and the International Space Station. Most programming languages and databases store timestamps in UTC.

About IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

Best time to call between UTC and Tehran

Both UTC and Tehran sit inside the 9 AM – 5 PM working day between 9:00 AM–1:30 PM UTC, which is 12:30 PM–5:00 PM IRST. That gives roughly 4 hours and 30 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

UTC and Tehran overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.

UTC is 3 hours 30 minutes ahead of Tehran (UTC UTC+00:00 → IRST UTC+03:30). The shared working window is 9:00 AM–1:30 PM UTC. Remember to re-check around daylight-saving transitions.

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between UTC and Tehran?

UTC (UTC, UTC+00:00) is 3 hours 30 minutes ahead of Tehran (IRST, UTC+03:30). The gap is currently +3h 30m.

How do I convert UTC time to Tehran time?

Add +3h 30m to UTC local time. For example, 9:00 AM in UTC is 12:30 PM in Tehran.

What time is it in Tehran right now?

Tehran uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the +3h 30m offset from UTC.

What is the best time to call Tehran from UTC?

Call between 9:00 AM and 1:30 PM UTC — that maps to 12:30 PM–5:00 PM IRST and keeps both parties inside the working day.

Which is ahead, UTC or Tehran?

UTC is 3 hours 30 minutes ahead of Tehran. When it is 12:00 PM in UTC it is 3:30 PM in Tehran.

Do UTC and Tehran use different time zones?

UTC uses UTC at UTC+00:00, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are UTC and Asia/Tehran.

Does daylight saving time affect the UTC–Tehran difference?

Neither zone observes daylight saving time, so the +3h 30m offset between UTC and Tehran is fixed all year.

Which other cities share UTC's time zone?

UTC also covers London, Dublin, Reykjavik, Accra, Lisbon, Dakar.

Which countries use UTC, UTC's zone?

UTC is used in Used worldwide as reference, Same zone as: UK, Ireland, Iceland, Portugal, Ghana.

Is there a day difference between UTC and Tehran?

Not normally. The +3h 30m gap only pushes the date over for late-evening times.

What is the time difference between UTC and Tehran?

Tehran is +3h 30m from UTC.

What timezone is UTC in?

UTC operates on its local timezone.

What timezone is Tehran in?

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.