Updating current time…
UTC
12am
3am
6am
9am
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6pm
9pm
IranIRST
UTC+3:30
12am
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9am
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9pm

Quick answers

Selected conversion

12:00 pm12:00 UTC (UTC+0), Oct 13, 2026 = 3:30 pm15:30 IRST (UTC+3:30), Oct 13, 2026

UTC is 3 hours and 30 minutes behind Tehran.

How the time difference changes

UTC is 3 hours and 30 minutes behind Tehran year-round.

Working hours of 9:00 am to 5:00 pm in UTC correspond to 12:30 pm to 8:30 pm in Tehran.Working hours of 09:00 to 17:00 in UTC correspond to 12:30 to 20:30 in Tehran.

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

Time Difference

Coordinated Universal Time is 3 hours and 30 minutes behind IRST (Iran Standard Time).
12:00 pm12:00 in UTC is 3:30 pm15:30 in Tehran, Iran

UTC to Tehran call time
Best time for a conference call or a meeting is between 9am-1:30pm09:00-13:30 in UTC which corresponds to 12:30pm-5pm12:30-17:00 in Tehran

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

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
UTCTehran, Iran
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
12:30am next day
1:30am next day
2:30am next day
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
00:30 next day
01:30 next day
02:30 next day

Coordinated Universal Time

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

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 (British Summer Time, Irish Standard Time, WEST).

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