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CT/CDT
12am
3am
6am
9am
12pm
3pm
6pm
9pm
CKT
UTC−10
5h behind
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

Selected conversion

7:00 am07:00 CDT (UTC-5), Oct 19, 2026 = 2:00 am02:00 CKT (UTC-10), Oct 19, 2026

CDT is 5 hours ahead of CKT.

How the time difference changes

For most of the year, CT is 5 hours ahead of CKT. From Nov 1, 2026 to Mar 14, 2027, CT is 4 hours ahead of CKT.

For most of the year, working hours of 9:00 am to 6:00 pm in CT correspond to 4:00 am to 1:00 pm in CKT. At other times of the year, working hours of 9:00 am to 6:00 pm in CT correspond to 5:00 am to 2:00 pm in CKT.For most of the year, working hours of 09:00 to 18:00 in CT correspond to 04:00 to 13:00 in CKT. At other times of the year, working hours of 09:00 to 18:00 in CT correspond to 05:00 to 14:00 in CKT.

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

Time Difference

Central Daylight Time is 5 hours ahead of Cook Island Time.
7:00 am07:00 in CDT is 2:00 am02:00 in CKT

CDT to CKT call time
Best time for a conference call or a meeting is between 2pm-6pm14:00-18:00 in CDT which corresponds to 9am-1pm09:00-13:00 in CKT

7:00 am07:00 Central Daylight Time (CDT). Offset UTC -5:00 hours
2:00 am02:00 Cook Island Time (CKT). Offset UTC -10:00 hours

7:00 am07:00 CDT / 2:00 am02:00 CKT

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Hourly time comparison
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Central Time

Central Time (CT) is a general term used to describe the areas that observe either the Central Standard Time (CST) or Central Daylight Time (CDT) in the United States and Canada. CT is not static but switches between CDT and CST.

Territories observing the time zone are primarily in North and Central America. It runs through several Mexican and U.S. states, as well as several Canadian provinces and Central American countries.

Countries using this time zone: Belize, Canada, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, United States

Principal Cities: The largest city in the CT 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

Map of the areas on Central Time (CT)
CT all year CT part of the year

Today the lighter areas are on UTC−6 (Central Standard Time, MDT).

CT 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 an offset of six hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Sierra - Military abbreviation for CT
  • S - short form of 'Sierra'
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

Cook Island Time

Offset: CKT is 10 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: Cook Islands

Principal Cities: The largest city in the CKT time zone is Avarua in the Cook Islands, with about 13,373 people. Other major cities in this time zone include Matavera.

Daylight Saving: Clocks in Cook Island Time (CKT) do not change for daylight saving time, so CKT stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.

CKT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -10 - basic short
  • -1000 - basic
  • -10:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -1000 - sign character (-) followed by a four digit time providing hours (10) and minutes (00) of the offset. Indicates an offset of ten hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Whiskey - Military abbreviation for CKT
  • W - short form of 'Whiskey'
Time zones with the GMT -10 offset:
  • HAST - Hawaii-Aleutian Standard Time
  • CKT - Cook Island Time
  • HST - Hawaii Standard Time
  • TAHT - Tahiti Time
  • W - Whiskey Time Zone