Istanbul to Jāsk-e Kohneh Time Converter

Updating current time…
Istanbul
TurkeyTRT
UTC+3
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Jāsk-e Kohneh
IranIRST
UTC+3:30
30m ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

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

Istanbul is 30 minutes behind Jāsk-e Kohneh.

How the time difference changes

Istanbul is 30 minutes behind Jāsk-e Kohneh year-round.

Working hours of 9:00 am to 6:00 pm in Istanbul correspond to 9:30 am to 6:30 pm in Jāsk-e Kohneh.Working hours of 09:00 to 18:00 in Istanbul correspond to 09:30 to 18:30 in Jāsk-e Kohneh.

Compare Istanbul time with Jāsk-e Kohneh time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

TRT (Turkey Time) is 30 minutes behind IRST (Iran Standard Time).
3:00 pm15:00 in Istanbul, Turkey is 3:30 pm15:30 in Jāsk-e Kohneh, Iran

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

3:00 pm15:00 TRT (Turkey Time) (Istanbul, Turkey). Offset UTC +3:00 hours
3:30 pm15:30 IRST (Iran Standard Time) (Jāsk-e Kohneh, Iran). Offset UTC +3:30 hours

3:00 pm15:00 Istanbul, Turkey / 3:30 pm15:30 Jāsk-e Kohneh, Iran

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
Istanbul, TurkeyJāsk-e Kohneh, Iran
12:30am
1:30am
2:30am
3:30am
4:30am
5:30am
6:30am
7:30am
8:30am
9:30am
10:30am
11:30am
12:30pm
1:30pm
2:30pm
3:30pm
4:30pm
5:30pm
6:30pm
7:30pm
8:30pm
9:30pm
10:30pm
11:30pm
00:30
01:30
02:30
03:30
04:30
05:30
06:30
07:30
08:30
09:30
10:30
11:30
12:30
13:30
14:30
15:30
16:30
17:30
18:30
19:30
20:30
21:30
22:30
23:30

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

Jāsk-e Kohneh Time Zone and Facts

Time Zone

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

Jāsk-e Kohneh Facts

Country
Iran
Population
1,202
Currency
Rial (IRR)
Geographic Coordinates
25° 44' N Latitude / 57° 46' E Longitude
International Dialing Code
+98
More About Jāsk-e Kohneh
Jāsk-e Kohneh local time and city facts