UTC to Iran
+3h 30mUTC
UTCSOURCEIran
IRSTGreen 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 – Coordinated Universal Time
UTC+00:00Coordinated Universal Time (UTC) is the world's primary time standard, used as the basis for civil time worldwide.
- •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.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •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.
Understanding the +3h 30m Gap: UTC vs Iran
UTC runs on Coordinated Universal Time (UTC) at UTC+00:00. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts UTC 3 hours 30 minutes ahead of Iran — 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 Iran. Midnight in UTC is 3:30 AM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
UTC to Iran time conversion table
| UTC (UTC) | Iran (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 Iran time
- Scheduling a call from UTC to Iran: a 10:00 AM start in UTC lands at 1:30 PM in Iran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both UTC and Iran 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.
- Coordinating a UTC-based team with Iran contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- 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 Iran 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 Iran
Both UTC and Iran 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 Iran 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 Iran (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:
Frequently Asked Questions
What is the time difference between UTC and Iran?
UTC (UTC, UTC+00:00) is 3 hours 30 minutes ahead of Iran (IRST, UTC+03:30). The gap is currently +3h 30m.
How do I convert UTC time to Iran time?
Add +3h 30m to UTC local time. For example, 9:00 AM in UTC is 12:30 PM in Iran.
What time is it in Iran right now?
Iran 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 Iran 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 Iran?
UTC is 3 hours 30 minutes ahead of Iran. When it is 12:00 PM in UTC it is 3:30 PM in Iran.
Do UTC and Iran use different time zones?
UTC uses UTC at UTC+00:00, while Iran (Iran) uses IRST at UTC+03:30. The IANA identifiers are UTC and Asia/Tehran.
Does daylight saving time affect the UTC–Iran difference?
Neither zone observes daylight saving time, so the +3h 30m offset between UTC and Iran 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 Iran?
Not normally. The +3h 30m gap only pushes the date over for late-evening times.
What is the time difference between UTC and Iran?
Iran is +3h 30m from UTC.
What timezone is UTC in?
UTC operates on its local timezone.
What timezone is Iran in?
Iran operates on its local timezone.
Which countries use UTC (Coordinated Universal Time)?
UTC is used in Used worldwide as reference, Same zone as: UK, Ireland, Iceland, Portugal, Ghana.
Does UTC observe daylight saving time?
No, UTC does not observe daylight saving time and remains at UTC+00:00 year-round.
What are some interesting 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).
Which cities are in the IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
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).
When is it midnight in UTC, what time is it in Iran?
When it is 12:00 AM (midnight) in UTC (UTC), it is +3h 30m later in Iran (IRST).
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