Chahār Rūstā’ī to Istanbul Time Converter

Updating current time…
Chahār Rūstā’ī
IranIRST
UTC+3:30
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Istanbul
TurkeyTRT
UTC+3
30m behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

3:30 pm15:30 IRST (UTC+3:30), Oct 31, 2026 = 3:00 pm15:00 TRT (UTC+3), Oct 31, 2026

Chahār Rūstā’ī is 30 minutes ahead of Istanbul.

How the time difference changes

Chahār Rūstā’ī is 30 minutes ahead of Istanbul year-round.

Working hours of 9:00 am to 6:00 pm in Chahār Rūstā’ī correspond to 8:30 am to 5:30 pm in Istanbul.Working hours of 09:00 to 18:00 in Chahār Rūstā’ī correspond to 08:30 to 17:30 in Istanbul.

Compare Chahār Rūstā’ī time with Istanbul time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

IRST (Iran Standard Time) is 30 minutes ahead of TRT (Turkey Time).
3:30 pm15:30 in Chahār Rūstā’ī, Iran is 3:00 pm15:00 in Istanbul, Turkey

Chahār Rūstā’ī to Istanbul call time
Best time for a conference call or a meeting is between 9:30am-6pm09:30-18:00 in Chahār Rūstā’ī which corresponds to 9am-5:30pm09:00-17:30 in Istanbul

3:30 pm15:30 IRST (Iran Standard Time) (Chahār Rūstā’ī, Iran). Offset UTC +3:30 hours
3:00 pm15:00 TRT (Turkey Time) (Istanbul, Turkey). Offset UTC +3:00 hours

3:30 pm15:30 Chahār Rūstā’ī, Iran / 3:00 pm15:00 Istanbul, Turkey

Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.

Hourly time comparison
Chahār Rūstā’ī, IranIstanbul, Turkey
11:30pm previous day
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23:30 previous day
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Chahār Rūstā’ī Time Zone and Facts

Time Zone

Abbreviation / Offset
IRST – Iran Standard Time, UTC+3:30 (no daylight saving time)

Chahār Rūstā’ī Facts

Country
Iran
Population
2,365
Currency
Rial (IRR)
Geographic Coordinates
29° 32' N Latitude / 50° 46' E Longitude
International Dialing Code
+98
More About Chahār Rūstā’ī
Chahār Rūstā’ī local time and city facts

Istanbul Time Zone and Facts

Time Zone

Abbreviation / Offset
TRT – Turkey Time, UTC+3 (no daylight saving time)

Istanbul Facts

Country
Turkey
Alternative Names
Bizanc, Bizánc, Byzance, Byzantion, Byzantium, Byzanz, Constantinoble, Constantinopla, Constantinople, Constantinopolen, Constantinopoli, Constantinopolis, Costantinopoli, Estambul, IST, Istamboul, Istambul, Istambuł, Istampoul, Istanbul, Istanbúl, Isztambul, Konstantinapoly, Konstantinopel, Konstantinopolo, Konstantinoupoli, Konstantinoupolis, Konstantinápoly, Kustantiniyah, Micklagard, Micklagård, Mikligardur, Mikligarður, Stamboul, Stambul, Stambula, Stambuł, Tsarigrad, Vizantija (Vizantija), Vyzantio, astnbwl, bijantium, byuzantion, byzntywn, iseutanbul, istambula, isutanburu, stin Poli [stimˈboli], yi si tan bu er, İstanbul, Βυζάντιο, Βυζαντιο, Ισταμπουλ, Ισταμπούλ, Κωνσταντινουπολη, Κωνσταντινούπολη, Κωνσταντινούπολις, στην Πόλι [stimˈboli], Византија (Vizantija), Истанбул, Стамбул, ביזנטיון, اسطنبول, इस्तांबुल, ইস্তাম্বুল, イスタンブール, ビュザンティオン, 伊斯坦布尔, 비잔티움, 이스탄불
Population
15,701,602
Currency
Lira (TRY)
Geographic Coordinates
41° 00' N Latitude / 28° 56' E Longitude
International Dialing Code
+90
More About Istanbul
Istanbul local time and city facts
Current Time in Turkey
Turkey time now