Kalleh Bast to Istanbul Time Converter

Updating current time…
Kalleh Bast
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 29, 2026 = 3:00 pm15:00 TRT (UTC+3), Oct 29, 2026

Kalleh Bast is 30 minutes ahead of Istanbul.

How the time difference changes

Kalleh Bast is 30 minutes ahead of Istanbul year-round.

Working hours of 9:00 am to 6:00 pm in Kalleh Bast correspond to 8:30 am to 5:30 pm in Istanbul.Working hours of 09:00 to 18:00 in Kalleh Bast correspond to 08:30 to 17:30 in Istanbul.

Compare Kalleh Bast 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 Kalleh Bast, Iran is 3:00 pm15:00 in Istanbul, Turkey

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

3:30 pm15:30 IRST (Iran Standard Time) (Kalleh Bast, Iran). Offset UTC +3:30 hours
3:00 pm15:00 TRT (Turkey Time) (Istanbul, Turkey). Offset UTC +3:00 hours

3:30 pm15:30 Kalleh Bast, 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
Kalleh Bast, IranIstanbul, Turkey
11:30pm previous day
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23:30 previous day
00:30
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Kalleh Bast Time Zone and Facts

Time Zone

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

Kalleh Bast Facts

Country
Iran
Population
7,889
Currency
Rial (IRR)
Geographic Coordinates
36° 38' N Latitude / 52° 37' E Longitude
International Dialing Code
+98
More About Kalleh Bast
Kalleh Bast 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