Iran
IST
CDT/CST
Central Daylight Time
GMT -5
CST automatically adjusted to CDT time zone, that is in use

Time Difference

IST (Iran Standard Time) is 8 hours and 30 minutes ahead of Central Daylight Time
7:30 am07:30 in Tehran, Iran is 11:00 pm23:00 in CDT

Tehran to CST call time
Best time for a conference call or a meeting is between 5:30pm-7:30pm in Tehran which corresponds to 8am-10am in CST

7:30 am07:30 IST (Iran Standard Time) (Tehran, Iran). Offset UTC +3:30 hours
11:00 pm23:00 Central Daylight Time (CDT). Offset UTC -5:00 hours

7:30 am07:30 Tehran, Iran / 11:00 pm23:00 CDT

Tehran, Iran CDT
12am (midnight) 3:30 pm
1am 4:30 pm
2am 5:30 pm
3am 6:30 pm
4am 7:30 pm
5am 8:30 pm
6am 9:30 pm
7am 10:30 pm
8am 11:30 pm
9am 12:30 am
10am 1:30 am
11am 2:30 am
12pm (noon) 3:30 am
1pm 4:30 am
2pm 5:30 am
3pm 6:30 am
4pm 7:30 am
5pm 8:30 am
6pm 9:30 am
7pm 10:30 am
8pm 11:30 am
9pm 12:30 pm
10pm 1:30 pm
11pm 2:30 pm
0:00 15:30
1:00 16:30
2:00 17:30
3:00 18:30
4:00 19:30
5:00 20:30
6:00 21:30
7:00 22:30
8:00 23:30
9:00 0:30
10:00 1:30
11:00 2:30
12:00 3:30
13:00 4:30
14:00 5:30
15:00 6:30
16:00 7:30
17:00 8:30
18:00 9:30
19:00 10:30
20:00 11:30
21:00 12:30
22:00 13:30
23:00 14:30

Tehran Information

Time Zone

Abbreviation / Name
IST - Iran Standard Time
IRDT - Iran Daylight Time
UTC / GMT Offset
+3:30 hours during Iran Standard Time, currently in use.
+4:30 hours during Iran Daylight Time.
Daylight Saving Time Change
+1:00 hour - DST is NOT in use
Daylight Saving Time Starts
Also called Spring Forward or Summer Time.
Daylight Saving Time Ends
Also called Fall Back or switch to Winter 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

Central Standard Time

Offset: CST is 6 hours behind Greenwich Mean Time (GMT) and is used in North America

Countries: It is used in following countries: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, United States

Principal Cities: The largest city in the CST timezone is Mexico City from Mexico with population about 12.294 million people. Other major cities in the area are Chicago, Houston, Iztapalapa, Ecatepec

French: HNC - Heure Normale du Centre

Spanish: CT - Tiempo Central Estándar, CT - Zona Centro

CST Time Zone Geo Map
CST timezone map

Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Central Daylight Time (CDT).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Central Standard Time (CST) has ended on Sunday, March 10, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, March 10, 2024, 3:00 am local daylight time instead. Standard time ends annually the on second Sunday of March.

Daylight saving time clock moves back for one hour from 2am to 1amStart: Central Standard Time (CST) starts on Sunday, November 3, 2024 at 2:00 am local time and clocks are set one hour back to Sunday, November 3, 2024, 1:00 am. Standard time starts annually the on first Sunday of November.

CST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -06 - basic short
  • -0600 - basic
  • -06:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates six hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for CST
  • S - short form of 'Sierra'
IANA/Olson: Reflects CST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Bahia_Banderas
  • America/Belize
  • America/Chicago
  • America/Chihuahua
  • America/Costa_Rica
  • America/El_Salvador
  • America/Guatemala
  • America/Indiana/Knox
  • America/Indiana/Tell_City
  • America/Knox_IN
  • America/Managua
  • America/Matamoros
  • America/Menominee
  • America/Merida
  • America/Mexico_City
  • America/Monterrey
  • America/North_Dakota/Beulah
  • America/North_Dakota/Center
  • America/North_Dakota/New_Salem
  • America/Ojinaga
  • America/Rainy_River
  • America/Rankin_Inlet
  • America/Regina
  • America/Resolute
  • America/Swift_Current
  • America/Tegucigalpa
  • America/Winnipeg
  • CST6CDT
  • Canada/Central
  • Canada/Saskatchewan
  • Mexico/General
  • US/Central
  • US/Indiana-Starke
CST Abbreviation: Several time zones share CST abbreviation and it could refer to these time zones
  • Central Standard Time - UTC -6
  • China Standard Time - UTC +8
  • Cuba Standard Time - UTC -5
  • Colombia Standard Time - UTC -5
Time zones with the GMT -6 offset:
  • CST - Central Standard Time
  • CT - Central Time
  • MDT - Mountain Daylight Time
  • EAST - Easter Island Standard Time
  • GALT - Galapagos Time
  • S - Sierra Time Zone