Istanbul to Iran
+0h 30mIstanbul
TRTSOURCEIran
IRSTGreen rows indicate typical business hours (9 AM - 5 PM)
TRT and IRST on the World Map
The map below highlights the TRT (Turkey Time) and IRST (Iran Standard Time) timezone regions across the globe.
TRT – Turkey Time
UTC+03:00Turkey Time (TRT, UTC+03:00) is the single time zone used across Turkey, fixed year round since 2016.
- •Turkey has used a permanent UTC+03:00 since September 2016.
- •TRT is level with Moscow Standard Time and Arabia Standard Time all year.
- •Because Turkey kept summer time permanently, western cities see very late winter sunrises.
- •Turkey previously observed daylight saving time from 1973 to 2016.
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.
About Istanbul
WikipediaIstanbul operates on Turkey Time (TRT), UTC+3 year-round. As a transcontinental city, Istanbul bridges European and Asian business hours.
The Grand Bazaar is one of the world's oldest and largest covered markets with 4,000+ shops.
Istanbul vs Iran: Offsets, DST and Best Call Times
Istanbul runs on Türkiye Standard Time (TRT) at UTC+03:00. Iran runs on Iran Standard Time (IRST) at UTC+03:30. That puts Istanbul 30 minutes ahead of Iran — a difference of +0h 30m at the current offsets.
In practice, when it is 9:00 AM in Istanbul it is 9:30 AM in Iran. Midnight in Istanbul is 12:30 AM in Iran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
Istanbul to Iran time conversion table
| Istanbul (TRT) | Iran (IRST) | Day |
|---|---|---|
| 12:00 AM | 12:30 AM | same day |
| 6:00 AM | 6:30 AM | same day |
| 7:00 AM | 7:30 AM | same day |
| 8:00 AM | 8:30 AM | same day |
| 9:00 AM | 9:30 AM | same day |
| 12:00 PM | 12:30 PM | same day |
| 3:00 PM | 3:30 PM | same day |
| 5:00 PM | 5:30 PM | same day |
| 6:00 PM | 6:30 PM | same day |
| 9:00 PM | 9:30 PM | same day |
Why people convert Istanbul to Iran time
- Scheduling a call from Istanbul to Iran: a 10:00 AM start in Istanbul lands at 10:30 AM in Iran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both Istanbul and Iran are inside the 9-to-5 working day between 9:00 AM and 4:30 PM TRT time (9:30 AM–5:00 PM IRST). That is roughly 7 hours 30 minutes of usable overlap.
- Coordinating a Istanbul-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 TRT" is unambiguous; "3 PM" across a +0h 30m gap is not.
- Block 9:00 AM–4:30 PM TRT as the recurring meeting window if you work primarily from Istanbul and need Iran colleagues present.
About TRT (Turkey Time)
Turkey Time (TRT) is fixed at UTC+03:00 all year. Turkey abolished seasonal clock changes in September 2016, moving to a permanent UTC+03:00 so the whole country stays on what was formerly summer time. That leaves Istanbul, which sits close to 29°E, on an offset well ahead of its solar time — sunrise in mid-winter comes after 08:30 local. TRT shares its offset with Moscow Standard Time, Arabia Standard Time and East Africa Time, so Istanbul is level with Moscow and Riyadh all year and one hour ahead of Central European Time during the European winter.
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 Istanbul and Iran
Both Istanbul and Iran sit inside the 9 AM – 5 PM working day between 9:00 AM–4:30 PM TRT, which is 9:30 AM–5:00 PM IRST. That gives roughly 7 hours and 30 minutes of shared time — the safest window for a live call or meeting.
Business hours overlap
Istanbul and Iran share 7 hours of working-hours overlap (9:00 AM–4:30 PM TRT), so scheduling a live meeting is straightforward.
Istanbul is 30 minutes ahead of Iran (TRT UTC+03:00 → IRST UTC+03:30). The shared working window is 9:00 AM–4:30 PM TRT. 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 Istanbul and Iran?
Istanbul (TRT, UTC+03:00) is 30 minutes ahead of Iran (IRST, UTC+03:30). The gap is currently +0h 30m.
How do I convert Istanbul time to Iran time?
Add +0h 30m to Istanbul local time. For example, 9:00 AM in Istanbul is 9:30 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 30m offset from Istanbul.
What is the best time to call Iran from Istanbul?
Call between 9:00 AM and 4:30 PM TRT — that maps to 9:30 AM–5:00 PM IRST and keeps both parties inside the working day.
Which is ahead, Istanbul or Iran?
Istanbul is 30 minutes ahead of Iran. When it is 12:00 PM in Istanbul it is 12:30 PM in Iran.
Do Istanbul and Iran use different time zones?
Istanbul (Turkey) uses TRT at UTC+03:00, while Iran (Iran) uses IRST at UTC+03:30. The IANA identifiers are Europe/Istanbul and Asia/Tehran.
Does daylight saving time affect the Istanbul–Iran difference?
Neither zone observes daylight saving time, so the +0h 30m offset between Istanbul and Iran is fixed all year.
Which other cities share Istanbul's time zone?
TRT also covers Istanbul, Ankara, Izmir, Bursa, Antalya.
Which countries use TRT, Istanbul's zone?
TRT is used in Turkey.
Is there a day difference between Istanbul and Iran?
Not normally. The +0h 30m gap only pushes the date over for late-evening times.
What is the time difference between Istanbul and Iran?
Iran is +0h 30m from Istanbul.
What timezone is Istanbul in?
Istanbul operates on Turkey Time (TRT), UTC+3 year-round. As a transcontinental city, Istanbul bridges European and Asian business hours.
What timezone is Iran in?
Iran operates on its local timezone.
What are the business hours in Istanbul?
Standard business hours in Istanbul are 9:00 AM - 6:00 PM TRT.
Which countries use TRT (Turkey Time)?
TRT is used in Turkey.
Does TRT observe daylight saving time?
No, TRT does not observe daylight saving time and remains at UTC+03:00 year-round.
What are some interesting facts about TRT?
Turkey has used a permanent UTC+03:00 since September 2016. TRT is level with Moscow Standard Time and Arabia Standard Time all year.
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 Istanbul, what time is it in Iran?
When it is 12:00 AM (midnight) in Istanbul (TRT), it is +0h 30m later in Iran (IRST).
Related Developer Tools
Explore more tools that work great with timezone conversions for international teams:
Related Timezone Conversions
More Istanbul time conversions
- istanbul to trt
- istanbul to turkey
- istanbul to london
- istanbul to dublin
- istanbul to paris
- istanbul to berlin
- istanbul to amsterdam
- istanbul to madrid
- istanbul to rome
- istanbul to zurich
- istanbul to stockholm
- istanbul to moscow
- istanbul to lisbon
- istanbul to warsaw
- istanbul to new york
- istanbul to dubai
- istanbul to tokyo
- istanbul to singapore
- istanbul to sydney
- istanbul to los angeles
- istanbul to delhi
- istanbul to mumbai
- istanbul to hong kong
- istanbul to toronto
- istanbul to kathmandu
- new york to istanbul
- london to istanbul
- dubai to istanbul
- tokyo to istanbul
- singapore to istanbul
- sydney to istanbul
- los angeles to istanbul
- paris to istanbul
- delhi to istanbul
- mumbai to istanbul
- berlin to istanbul
See every conversion from Istanbul →·See every conversion from Iran →