Tehran to CST Time Converter
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Quick answers
Selected conversion
3:30 pm15:30 IRST (UTC+3:30), Nov 4, 2026 = 6:00 am06:00 CST (UTC-6), Nov 4, 2026
Tehran is 9 hours and 30 minutes ahead of CST.
How the time difference changes
For most of the year, Tehran is 8 hours and 30 minutes ahead of CDT. From Nov 1, 2026 to Mar 14, 2027, Tehran is 9 hours and 30 minutes ahead of CST.
For most of the year, working hours of 9:00 am to 6:00 pm in Tehran correspond to 12:30 am to 9:30 am in CDT. At other times of the year, working hours of 9:00 am to 6:00 pm in Tehran correspond to 11:30 pm (previous day) to 8:30 am in CST.For most of the year, working hours of 09:00 to 18:00 in Tehran correspond to 00:30 to 09:30 in CDT. At other times of the year, working hours of 09:00 to 18:00 in Tehran correspond to 23:30 (previous day) to 08:30 in CST.
Compare Tehran time with CST 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 9 hours and 30 minutes ahead of Central Standard Time.
3:30 pm15:30 in Tehran, Iran is 6:00 am06:00 in CST
Tehran to CST call time
Best time for a conference call or a meeting is between 6pm-7pm18:00-19:00 in Tehran which corresponds to 8:30am-9:30am08:30-09:30 in CST. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
3:30 pm15:30 IRST (Iran Standard Time) (Tehran, Iran). Offset UTC +3:30 hours
6:00 am06:00 Central Standard Time (CST). Offset UTC -6:00 hours
3:30 pm15:30 Tehran, Iran / 6:00 am06:00 CST
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Tehran Time Zone and Facts
Time Zone
Tehran Facts
Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Belize, Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, United States
Principal Cities: The largest city in the CST time zone is Mexico City in Mexico, with about 12.294 million people. Other major cities in this time zone include Chicago, Houston, Puebla, Santiago de Querétaro.
French: HNC - Heure Normale du Centre
Spanish: CT - Tiempo Central Estándar, CT - Zona Centro
Today all shaded areas are on CST.
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Central Daylight Time (CDT).
Start: Central Standard Time (CST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
End: Central Standard Time (CST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
CST representations, usage and related time zones
- -06 - basic short
- -0600 - basic
- -06:00 - extended
- -0600 - sign character (-) followed by a four digit time providing hours (06) and minutes (00) of the offset. Indicates an offset of six hours to the west of the zero meridian.
- Sierra - Military abbreviation for CST
- S - short form of 'Sierra'
- 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
- Central Standard Time - UTC -6
- China Standard Time - UTC +8
- Cuba Standard Time - UTC -5
- CST - Central Standard Time
- CT - Central Time
- MDT - Mountain Daylight Time
- EAST - Easter Island Standard Time
- GALT - Galapagos Time
- S - Sierra Time Zone