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HDT
12am
3am
6am
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3pm
6pm
9pm
HDT is not used on this date
This converter keeps HDT at UTC−9. Honolulu uses HST (UTC−10) on this date. Open the HST converter, or choose Honolulu, Pearl City, or Hilo for city-specific time.
AKDT/AKST
UTC−8
1h ahead
12am
3am
6am
9am
12pm
3pm
6pm
9pm
Alaska Time is on daylight saving time: AKDT (UTC−8) until Sun, Nov 1.

Quick answers

Selected conversion

3:00 am03:00 HDT (UTC-9), Oct 22, 2026 = 4:00 am04:00 AKDT (UTC-8), Oct 22, 2026

HDT is 1 hour behind AKDT.

HDT and AKST examples

These examples always use HDT (UTC-9) and AKST (UTC-9). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.

HDT and AKST have the same local time.

How the time difference changes

For most of the year, HDT is 1 hour behind AKDT. From Nov 1, 2026 to Mar 14, 2027, HDT and AKST have the same time.

For most of the year, working hours of 9:00 am to 6:00 pm in HDT correspond to 10:00 am to 7:00 pm in AKDT. At other times of the year, working hours of 9:00 am to 6:00 pm in HDT correspond to 9:00 am to 6:00 pm in AKST.For most of the year, working hours of 09:00 to 18:00 in HDT correspond to 10:00 to 19:00 in AKDT. At other times of the year, working hours of 09:00 to 18:00 in HDT correspond to 09:00 to 18:00 in AKST.

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

Time Difference

Hawaii Daylight Time is 1 hour behind Alaska Daylight Time.
3:00 am03:00 in HDT is 4:00 am04:00 in AKDT

HDT to AKDT call time
Best time for a conference call or a meeting is between 9am-5pm09:00-17:00 in HDT which corresponds to 10am-6pm10:00-18:00 in AKDT

3:00 am03:00 Hawaii Daylight Time (HDT). Offset UTC -9:00 hours
4:00 am04:00 Alaska Daylight Time (AKDT). Offset UTC -8:00 hours

3:00 am03:00 HDT / 4:00 am04:00 AKDT

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.

Hourly time comparison
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Hawaii Daylight Time

Offset: HDT is 9 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: United States

Map of the areas on Hawaii Daylight Time (HDT)
HDT part of the year

Today all shaded areas are on HDT.

HDT representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -09 - basic short
  • -0900 - basic
  • -09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Victor - Military abbreviation for HDT
  • V - short form of 'Victor'
IANA/Olson: Reflects HDT time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Adak
  • America/Atka
  • US/Aleutian
Time zones with the GMT -9 offset:
  • 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

Alaska Standard Time

Offset: AKST is 9 hours behind Greenwich Mean Time (GMT).

Countries using this time zone: United States

Principal Cities: The largest city in the AKST 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.

Map of the areas on Alaska Standard Time (AKST)
AKST part of the year

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).

123456789101112End: Alaska Standard Time (AKST) 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.

123456789101112Start: Alaska Standard Time (AKST) 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.

See USA daylight saving time and upcoming clock changes worldwide.

AKST representations, usage and related time zones

W3C/ISO-8601: International standard covering representation and exchange of dates and time-related data
  • -09 - basic short
  • -0900 - basic
  • -09:00 - extended
Email/RFC-2822: Internet Message Format Date Standard, typically used for timestamps in email headers
  • -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.
Military/NATO: Used by the U.S. military, Chinese military and others
  • Victor - Military abbreviation for AKST
  • V - short form of 'Victor'
IANA/Olson: Reflects AKST time zone boundaries defined by political bodies, primarily intended for use with computer programs and operating systems
  • America/Anchorage
  • America/Juneau
  • America/Metlakatla
  • America/Nome
  • America/Sitka
  • America/Yakutat
  • US/Alaska
Time zones with the GMT -9 offset:
  • 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