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CKT
12am
3am
6am
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ET/EDT
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Quick answers

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2:00 am02:00 CKT (UTC-10), Oct 13, 2026 = 8:00 am08:00 EDT (UTC-4), Oct 13, 2026

CKT is 6 hours behind EDT.

How the time difference changes

For most of the year, CKT is 6 hours behind ET. From Nov 1, 2026 to Mar 14, 2027, CKT is 5 hours behind ET.

For most of the year, working hours of 9:00 am to 5:00 pm in CKT correspond to 3:00 pm to 11:00 pm in ET. At other times of the year, working hours of 9:00 am to 5:00 pm in CKT correspond to 2:00 pm to 10:00 pm in ET.For most of the year, working hours of 09:00 to 17:00 in CKT correspond to 15:00 to 23:00 in ET. At other times of the year, working hours of 09:00 to 17:00 in CKT correspond to 14:00 to 22:00 in ET.

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

Time Difference

Cook Island Time is 6 hours behind Eastern Daylight Time.
2:00 am02:00 in CKT is 8:00 am08:00 in EDT

CKT to EDT call time
Best time for a conference call or a meeting is between 9am-11am09:00-11:00 in CKT which corresponds to 3pm-5pm15:00-17:00 in EDT

2:00 am02:00 Cook Island Time (CKT). Offset UTC -10:00 hours
8:00 am08:00 Eastern Daylight Time (EDT). Offset UTC -4:00 hours

2:00 am02:00 CKT / 8:00 am08:00 EDT

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Hourly time comparison
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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

Eastern Time

Eastern Time (ET) is a general term used to describe the areas that observe either the Eastern Standard Time (EST) or Eastern Daylight Time (EDT) in the United States and Canada. ET is not static but switches between EDT and EST.

ET is also used somewhat as a de facto official time for all of the United States because it encompasses 17 U.S. states in the eastern part of the contiguous United States including the capital city Washington D.C., the most populous city New York and half of the country’s population.

In the United States nationally televised programs, evening newscasts, talent and awards shows, and any other nationally televised event that airs live on American television during prime time and on the weekends are broadcast live in the Eastern Time Zone. Major professional sports leagues MLB, NBA, NFL and NHL also provide their game times in Eastern Time, even if teams are from outside of Eastern Time.

Countries using this time zone: Bahamas, Canada, Haiti, Jamaica, Cayman Islands, Mexico, Panama, Turks & Caicos Is, United States.

Principal Cities: The largest city in the ET time zone is New York City in the United States, with about 8.804 million people. Other major cities in this time zone include Toronto, Montréal, Philadelphia, Port-au-Prince.

French: HNE - Heure Normale de l'Est

Spanish: ET - Tiempo del Este, ET - Zona Sureste

Map of the areas on Eastern Time (ET)
ET all year ET part of the year

Today the lighter areas are on UTC−5 (Central Daylight Time, EST).

ET representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -05 - basic short
  • -0500 - basic
  • -05:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -0500 - sign character (-) followed by a four digit time providing hours (05) and minutes (00) of the offset. Indicates an offset of five hours to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Romeo - Military abbreviation for ET
  • R - short form of 'Romeo'
ET Abbreviation: Several time zones share ET abbreviation and it could refer to these time zones
  • Eastern Time - UTC -5
  • Tiempo del Este - UTC -5
Time zones with the GMT -5 offset:
  • CDT - Central Daylight Time
  • EST - Eastern Standard Time
  • ET - Eastern Time
  • COT - Colombia Time
  • CST - Cuba Standard Time
  • EASST - Easter Island Summer Time
  • ECT - Ecuador Time
  • PET - Peru Time
  • R - Romeo Time Zone