CST to AHDT Converter
Central Time is on daylight saving time: CDT (UTC−5) until Sun, Nov 1.
Mexico City and Saskatchewan stay on CST (UTC−6).
Start by searching for a time zone, city, or town.
Add one or more places to compare local times, adjust the date, and share the result.
Quick answers
Selected conversion
7:00 am07:00 CDT (UTC-5), Oct 15, 2026 = 3:00 am03:00 AHDT (UTC-9), Oct 15, 2026
CDT is 4 hours ahead of AHDT.
CST (US winter time, UTC-6) and AHDT examples
These examples always use CST (UTC-6) and AHDT (UTC-9). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
CST is 3 hours ahead of AHDT.
CST is US Central winter time (early November to mid-March). The rest of the year Chicago uses CDT (UTC-5), one hour later. For Central Time that follows daylight saving time, use CT to AHDT. For daylight-time examples, use CDT to AHDT.
How the time difference changes
For most of the year, CDT is 4 hours ahead of AHDT. From Nov 1, 2026 to Mar 14, 2027, CST is 3 hours ahead of AHDT.
For most of the year, working hours of 9:00 am to 6:00 pm in CDT correspond to 5:00 am to 2:00 pm in AHDT. At other times of the year, working hours of 9:00 am to 6:00 pm in CST correspond to 6:00 am to 3:00 pm in AHDT.For most of the year, working hours of 09:00 to 18:00 in CDT correspond to 05:00 to 14:00 in AHDT. At other times of the year, working hours of 09:00 to 18:00 in CST correspond to 06:00 to 15:00 in AHDT.
Compare CST time with AHDT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Central Daylight Time is 4 hours ahead of Alaska-Hawaii Daylight Time.
7:00 am07:00 in CDT is 3:00 am03:00 in AHDT
CDT to AHDT call time
Best time for a conference call or a meeting is between 1pm-6pm13:00-18:00 in CDT which corresponds to 9am-2pm09:00-14:00 in AHDT
7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
3:00 am03:00 Alaska-Hawaii Daylight Time (AHDT). Offset UTC -9:00 hours
7:00 am07:00 CDT / 3:00 am03:00 AHDT
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.
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Central Standard Time
Offset: CST is 6 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Belize, Canada, Costa Rica, Guatemala, Honduras, Mexico, Nicaragua, El Salvador, 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 the lighter areas are on UTC−5 (Central Daylight Time).
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).
End: Central Standard Time (CST) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Central Standard Time (CST) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
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
Alaska-Hawaii Daylight Time
Offset: AHDT is 9 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: United States
Principal Cities: The largest city in the AHDT time zone is Anchorage in the United States, with about 289,600 people. Other major cities in this time zone include Fairbanks, Juneau, Knik-Fairview, Wasilla.
Today the shaded areas are on UTC−8 (AKDT).
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Alaska Daylight Time (AKDT).
End: Alaska-Hawaii Daylight Time (AHDT) ended on Sunday, March 8, 2026 at 2:00 am02:00 local time and clocks were set one hour forward to Sunday, March 8, 2026, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
Start: Alaska-Hawaii Daylight Time (AHDT) starts on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
AHDT representations, usage and related time zones
- -09 - basic short
- -0900 - basic
- -09:00 - extended
- -0900 - sign character (-) followed by a four digit time providing hours (09) and minutes (00) of the offset. Indicates an offset of nine hours to the west of the zero meridian.
- Victor - Military abbreviation for AHDT
- V - short form of 'Victor'
- AKST - Alaska Standard Time
- AHDT - Alaska-Hawaii Daylight Time
- HADT - Hawaii-Aleutian Daylight Time
- GAMT - Gambier Time
- HDT - Hawaii Daylight Time
- V - Victor Time Zone