Updating current time…
TurkeyTRT
UTC+3
12am
3am
6am
9am
12pm
3pm
6pm
9pm
ET
UTC−5
8h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm
UTC
12am
3am
6am
9am
12pm
3pm
6pm
9pm
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), Nov 13, 2026 = 7:00 am07:00 ET (UTC-5), Nov 13, 2026 = 12:00 pm12:00 UTC (UTC+0), Nov 13, 2026 = 3:30 pm15:30 IRST (UTC+3:30), Nov 13, 2026

Istanbul is 8 hours ahead of ET. Istanbul is 3 hours ahead of UTC. Istanbul is 30 minutes behind Tehran.

How the time difference changes

Istanbul to ET

For most of the year, Istanbul is 7 hours ahead of ET. From Nov 1, 2026 to Mar 14, 2027, and from Nov 7, 2027 to Mar 12, 2028, Istanbul is 8 hours ahead of ET.

For most of the year, working hours of 9:00 am to 6:00 pm in Istanbul correspond to 2:00 am to 11:00 am in ET. At other times of the year, working hours of 9:00 am to 6:00 pm in Istanbul correspond to 1:00 am to 10:00 am in ET.For most of the year, working hours of 09:00 to 18:00 in Istanbul correspond to 02:00 to 11:00 in ET. At other times of the year, working hours of 09:00 to 18:00 in Istanbul correspond to 01:00 to 10:00 in ET.

Istanbul to UTC

Istanbul is 3 hours ahead of UTC year-round.

Working hours of 9:00 am to 6:00 pm in Istanbul correspond to 6:00 am to 3:00 pm in UTC.Working hours of 09:00 to 18:00 in Istanbul correspond to 06:00 to 15:00 in UTC.

Istanbul to Tehran

Istanbul is 30 minutes behind Tehran year-round.

Working hours of 9:00 am to 6:00 pm in Istanbul correspond to 9:30 am to 6:30 pm in Tehran.Working hours of 09:00 to 18:00 in Istanbul correspond to 09:30 to 18:30 in Tehran.

Compare Istanbul time with ET, UTC, and Tehran time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.

Time Difference

TRT (Turkey Time) is 8 hours ahead of Eastern Time. TRT (Turkey Time) is 3 hours ahead of Coordinated Universal Time. TRT (Turkey Time) is 30 minutes behind IRST (Iran Standard Time).
3:00 pm15:00 in Istanbul, Turkey is 7:00 am07:00 in ET and is 12:00 pm12:00 in UTC and is 3:30 pm15:30 in Tehran, Iran

Istanbul to ET call time
Best time for a conference call or a meeting is between 5pm-6pm17:00-18:00 in Istanbul which corresponds to 9am-10am09:00-10:00 in ET.
Istanbul to UTC call time
Best time for a conference call or a meeting is between 12pm-6pm12:00-18:00 in Istanbul which corresponds to 9am-3pm09:00-15:00 in UTC.
Istanbul to Tehran 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 Tehran.

3:00 pm15:00 TRT (Turkey Time) (Istanbul, Turkey). Offset UTC +3:00 hours
7:00 am07:00 Eastern Time (ET). Offset UTC -5:00 hours
12:00 pm12:00 Coordinated Universal Time (UTC). Offset UTC 0:00 hours
3:30 pm15:30 IRST (Iran Standard Time) (Tehran, Iran). Offset UTC +3:30 hours

3:00 pm15:00 Istanbul, Turkey / 7:00 am07:00 ET / 12:00 pm12:00 UTC / 3:30 pm15:30 Tehran, 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, TurkeyETUTCTehran, Iran
4:00pm previous day9:00pm previous day12:30am
5:00pm previous day10:00pm previous day1:30am
6:00pm previous day11:00pm previous day2:30am
7:00pm previous day12:00am3:30am
8:00pm previous day1:00am4:30am
9:00pm previous day2:00am5:30am
10:00pm previous day3:00am6:30am
11:00pm previous day4:00am7:30am
12:00am5:00am8:30am
1:00am6:00am9:30am
2:00am7:00am10:30am
3:00am8:00am11:30am
4:00am9:00am12:30pm
5:00am10:00am1:30pm
6:00am11:00am2:30pm
7:00am12:00pm3:30pm
8:00am1:00pm4:30pm
9:00am2:00pm5:30pm
10:00am3:00pm6:30pm
11:00am4:00pm7:30pm
12:00pm5:00pm8:30pm
1:00pm6:00pm9:30pm
2:00pm7:00pm10:30pm
3:00pm8:00pm11:30pm
16:00 previous day21:00 previous day00:30
17:00 previous day22:00 previous day01:30
18:00 previous day23:00 previous day02:30
19:00 previous day00:0003:30
20:00 previous day01:0004:30
21:00 previous day02:0005:30
22:00 previous day03:0006:30
23:00 previous day04:0007:30
00:0005:0008:30
01:0006:0009:30
02:0007:0010:30
03:0008:0011:30
04:0009:0012:30
05:0010:0013:30
06:0011:0014:30
07:0012:0015:30
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09:0014:0017:30
10:0015:0018:30
11:0016:0019:30
12:0017:0020:30
13:0018:0021:30
14:0019:0022:30
15:0020:0023:30

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
Current Time in Turkey

Eastern Time

Eastern Time (ET) is a general term used to describe the areas that observe either the Eastern Standard Time (EST) or Eastern Daylight Time (EDT) in the United States and Canada. ET is not static but switches between EDT and EST.

ET is also used somewhat as a de facto official time for all of the United States because it encompasses 17 U.S. states in the eastern part of the contiguous United States including the capital city Washington D.C., the most populous city New York and half of the country’s population.

In the United States nationally televised programs, evening newscasts, talent and awards shows, and any other nationally televised event that airs live on American television during prime time and on the weekends are broadcast live in the Eastern Time Zone. Major professional sports leagues MLB, NBA, NFL and NHL also provide their game times in Eastern Time, even if teams are from outside of Eastern Time.

Countries using this time zone: Bahamas, Canada, Cayman Islands, Haiti, Jamaica, Mexico, Panama, Turks and Caicos Islands, United States

Principal Cities: The largest city in the ET time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

Map of the areas on Eastern Time (ET)
ET all year ET part of the year

Today all shaded areas are on ET.

ET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for ET
  • R - short form of 'Romeo'
ET Abbreviation: Several time zones share ET abbreviation and it could refer to these time zones
  • Eastern Time - UTC -5
  • Tiempo del Este - UTC -5
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone

Coordinated Universal Time

Offset: UTC is the same as Greenwich Mean Time (GMT).

Countries using this time zone: Antarctica, Burkina Faso, Faroe Islands, Gambia, Ghana, Greenland, Guernsey, Guinea, Guinea-Bissau, Iceland, Ireland, Isle of Man, Ivory Coast, Jersey, Liberia, Mali, Mauritania, Morocco, Portugal, Saint Helena, São Tomé and Príncipe, Senegal, Sierra Leone, Spain, Togo, United Kingdom, Western Sahara

Principal Cities: The largest city in the UTC time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Abidjan, Bamako, Casablanca, Dakar.

Coordinated Universal Time (UTC) is the world time standard that regulates clocks and time. It is the successor to Greenwich Mean Time (GMT). For casual use, UTC is the same as GMT, but UTC is the standard the scientific community uses.
UTC has been the time standard commonly used across the world since 1972. It is used in many technical fields, such as aviation and meteorology, and to synchronize time across internet networks.

Map of the areas on Coordinated Universal Time (UTC)
UTC all year UTC part of the year

Today some of the lighter areas are on UTC−1.

UTC representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
  • +00 - basic short
  • +0000 - basic
  • +00:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Zulu - Military abbreviation for UTC
  • Z - short form of 'Zulu'
IANA/Olson: Reflects UTC time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • Etc/UCT
  • Etc/UTC
  • Etc/Universal
  • Etc/Zulu
  • UCT
  • UTC
  • Universal
  • Zulu
Time zones with the GMT +0 offset:
  • EGST - Eastern Greenland Summer Time
  • GMT - Greenwich Mean Time
  • WET - Western European Time
  • AZOST - Azores Summer Time
  • UTC - Coordinated Universal Time
  • WT - Western Sahara Standard Time
  • Z - Zulu Time Zone

Tehran Time Zone and Facts

Time Zone

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

Tehran Facts

Country
Iran
Alternative Names
THR, Taekhran, Tahran, Techerane, Teera, Teerao, Teerã, Teerão, Tegeran, Teheran, Teherana, Teheranas, Teherano, Teherán, Teherāna, Tehran, Tehrano, Tekheran, Téhéran, de hei lan, teharan, teharana, tehelan, teheran, tehran, teirani, thran, thrn, thrwn, tihiran, tihran, Τεχεράνη, Тæхран, Тегеран, Техеран, Теҳрон, Թեհրան, טהראן, טהרן, تهران, تهرون, تِهران, تِهِرَن, تہران, طهران, ܛܗܪܐܢ, तेहरान, তেহরান, தெஹ்ரான், เตหะราน, ཏེ་ཧི་རན​།, თეირანი, ቴህራን, テヘラン, 德黑兰, 테헤란
Population
7,153,309
Currency
Rial (IRR)
Geographic Coordinates
35° 41' N Latitude / 51° 25' E Longitude
International Dialing Code
+98