TRT to IRST
+0h 30mTRT
TRTSOURCEIRST
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.
Understanding the +0h 30m Gap: TRT vs IRST
TRT runs on Turkey Time (TRT) at UTC+03:00. IRST runs on Iran Standard Time (IRST) at UTC+03:30. That puts TRT 30 minutes ahead of IRST — a difference of +0h 30m at the current offsets.
In practice, when it is 9:00 AM in TRT it is 9:30 AM in IRST. Midnight in TRT is 12:30 AM in IRST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
TRT to IRST time conversion table
| TRT (TRT) | IRST (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 TRT to IRST time
- Scheduling a call from TRT to IRST: a 10:00 AM start in TRT lands at 10:30 AM in IRST, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both TRT and IRST 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.
- Watching a live event or market open: TRT viewers need 9:30 AM in IRST to catch a 9:00 AM start there, and 11:30 PM if the event is anchored to TRT.
- 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 TRT and need IRST 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 TRT and IRST
Both TRT and IRST 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
TRT and IRST share 7 hours of working-hours overlap (9:00 AM–4:30 PM TRT), so scheduling a live meeting is straightforward.
TRT is 30 minutes ahead of IRST (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 TRT and IRST?
TRT (TRT, UTC+03:00) is 30 minutes ahead of IRST (IRST, UTC+03:30). The gap is currently +0h 30m.
How do I convert TRT time to IRST time?
Add +0h 30m to TRT local time. For example, 9:00 AM in TRT is 9:30 AM in IRST.
What time is it in IRST right now?
IRST 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 TRT.
What is the best time to call IRST from TRT?
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, TRT or IRST?
TRT is 30 minutes ahead of IRST. When it is 12:00 PM in TRT it is 12:30 PM in IRST.
Does daylight saving time affect the TRT–IRST difference?
Neither zone observes daylight saving time, so the +0h 30m offset between TRT and IRST is fixed all year.
Which other cities share TRT's time zone?
TRT also covers Istanbul, Ankara, Izmir, Bursa, Antalya.
Which countries use TRT, TRT's zone?
TRT is used in Turkey.
Is there a day difference between TRT and IRST?
Not normally. The +0h 30m gap only pushes the date over for late-evening times.
What is the time difference between TRT and IRST?
IRST is +0h 30m from TRT.
What timezone is TRT in?
TRT operates on its local timezone.
What timezone is IRST in?
IRST operates on its local timezone.
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 TRT, what time is it in IRST?
When it is 12:00 AM (midnight) in TRT (TRT), it is +0h 30m later in IRST (IRST).
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See every conversion from TRT →·See every conversion from IRST →