HDT to CKT Converter
HDT is not used on this date
This converter keeps HDT at UTC−9. Adak uses HST (UTC−10) on this date. Open the HST converter, or choose Honolulu, Pearl City, or Hilo for city-specific time.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
3:00 am03:00 HDT (UTC-9), Nov 15, 2026 = 2:00 am02:00 CKT (UTC-10), Nov 15, 2026
HDT is 1 hour ahead of CKT.
HDT and CKT examples
These examples always use HDT (UTC-9) and CKT (UTC-10). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
HDT is 1 hour ahead of CKT.
How the time difference changes
HDT is 1 hour ahead of CKT year-round.
Working hours of 9:00 am to 6:00 pm in HDT correspond to 8:00 am to 5:00 pm in CKT.Working hours of 09:00 to 18:00 in HDT correspond to 08:00 to 17:00 in CKT.
Compare HDT time with CKT time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Hawaii-Aleutian Daylight Time is 1 hour ahead of Cook Island Time.
3:00 am03:00 in HDT is 2:00 am02:00 in CKT
HDT to CKT call time
Best time for a conference call or a meeting is between 10am-6pm10:00-18:00 in HDT which corresponds to 9am-5pm09:00-17:00 in CKT.
3:00 am03:00 Hawaii-Aleutian Daylight Time (HDT). Offset UTC -9:00 hours
2:00 am02:00 Cook Island Time (CKT). Offset UTC -10:00 hours
3:00 am03:00 HDT / 2:00 am02:00 CKT
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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Hawaii-Aleutian Daylight Time
Offset: HDT is 9 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: United States
Today the shaded areas are on UTC−10 (HST).
Daylight Saving: Hawaii-Aleutian Daylight Time (HDT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Hawaii-Aleutian Standard Time (HAST).
End: Hawaii-Aleutian Daylight Time (HDT) ended 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 local standard time instead. Daylight saving ends annually on the first Sunday of November.
Start: Hawaii-Aleutian Daylight Time (HDT) starts 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. Daylight saving starts annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
HDT 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 HDT
- V - short form of 'Victor'
- America/Adak
- America/Atka
- US/Aleutian
- AKST - Alaska Standard Time
- AHDT - Alaska-Hawaii Daylight Time
- HADT - Hawaii-Aleutian Daylight Time
- GAMT - Gambier Time
- HDT - Hawaii-Aleutian Daylight Time
- V - Victor 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
- -10 - basic short
- -1000 - basic
- -10:00 - extended
- -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.
- Whiskey - Military abbreviation for CKT
- W - short form of 'Whiskey'
- HAST - Hawaii-Aleutian Standard Time
- CKT - Cook Island Time
- HST - Hawaii Standard Time
- TAHT - Tahiti Time
- W - Whiskey Time Zone