IRST to Iran
+0hIRST
IRSTSOURCEIran
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
IRST and IRST on the World Map
The map below highlights the IRST (Iran Standard Time) and IRST (Iran Standard Time) timezone regions across the globe.
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.
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.
IRST vs Iran: Offsets, DST and Best Call Times
IRST runs on Iran Standard Time (IRST) at UTC+03:30. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts IRST no time difference Iran — a difference of +0h at the current offsets.
In practice, when it is 9:00 AM in IRST it is 9:00 AM in Iran. Midnight in IRST is 12:00 AM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
IRST to Iran time conversion table
| IRST (IRST) | Iran (IRST) | Day |
|---|---|---|
| 12:00 AM | 12:00 AM | same day |
| 6:00 AM | 6:00 AM | same day |
| 7:00 AM | 7:00 AM | same day |
| 8:00 AM | 8:00 AM | same day |
| 9:00 AM | 9:00 AM | same day |
| 12:00 PM | 12:00 PM | same day |
| 3:00 PM | 3:00 PM | same day |
| 5:00 PM | 5:00 PM | same day |
| 6:00 PM | 6:00 PM | same day |
| 9:00 PM | 9:00 PM | same day |
Why people convert IRST to Iran time
- Scheduling a call from IRST to Iran: a 10:00 AM start in IRST lands at 10:00 AM in Iran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both IRST and Iran are inside the 9-to-5 working day between 9:00 AM and 5:00 PM IRST time (9:00 AM–5:00 PM IRST). That is roughly 8 hours of usable overlap.
- Keeping family and friends in sync: knowing that 8:00 PM in IRST is 8:00 PM in Iran makes it easy to avoid calling at 3 AM.
- Always state the zone abbreviation, not just the hour. "3:00 PM IRST" is unambiguous; "3 PM" across a +0h gap is not.
- Block 9:00 AM–5:00 PM IRST as the recurring meeting window if you work primarily from IRST and need Iran colleagues present.
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.
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 IRST and Iran
Both IRST and Iran sit inside the 9 AM – 5 PM working day between 9:00 AM–5:00 PM IRST, which is 9:00 AM–5:00 PM IRST. That gives roughly 8 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
IRST and Iran share 8 hours of working-hours overlap (9:00 AM–5:00 PM IRST), so scheduling a live meeting is straightforward.
IRST is no time difference Iran (IRST UTC+03:30 → IRST UTC+03:30). The shared working window is 9:00 AM–5:00 PM IRST. 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 IRST and Iran?
IRST (IRST, UTC+03:30) is no time difference Iran (IRST, UTC+03:30). The gap is currently +0h.
How do I convert IRST time to Iran time?
Add +0h to IRST local time. For example, 9:00 AM in IRST is 9:00 AM 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 +0h offset from IRST.
What is the best time to call Iran from IRST?
Call between 9:00 AM and 5:00 PM IRST — that maps to 9:00 AM–5:00 PM IRST and keeps both parties inside the working day.
Which is ahead, IRST or Iran?
IRST and Iran are currently on the same clock.
Do IRST and Iran use different time zones?
IRST uses IRST at UTC+03:30, while Iran (Iran) uses IRST at UTC+03:30. They actually share the same IANA zone.
Does daylight saving time affect the IRST–Iran difference?
Neither zone observes daylight saving time, so the +0h offset between IRST and Iran is fixed all year.
Which other cities share IRST's time zone?
IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
Which countries use IRST, IRST's zone?
IRST is used in Iran.
What is the time difference between IRST and Iran?
Iran is +0h from IRST.
What timezone is IRST in?
IRST operates on its local timezone.
What timezone is Iran in?
Iran operates on its local timezone.
Which countries use IRST (Iran Standard Time)?
IRST is used in Iran.
Does IRST observe daylight saving time?
Yes, IRST switches to IRDT during summer months.
What are some interesting 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).
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 IRST, what time is it in Iran?
When it is 12:00 AM (midnight) in IRST (IRST), it is +0h later in Iran (IRST).
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