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HADT to AKST Converter

Updating current time…
HAST/HADT
Hawaii-Aleutian Standard Time
GMT -10
12am
3am
6am
9am
12pm
3pm
6pm
9pm
HADT is not used on this date
This converter uses HAST (GMT -10), the offset Adak uses on this date. Open the HAST converter.
AKST
Alaska Standard Time
GMT -9
12am
3am
6am
9am
12pm
3pm
6pm
9pm

Quick answers

For most of the year, HADT is 1 hour behind AKDT. During seasonal clock changes, HAST is 1 hour behind AKST. Briefly around those changes, HADT and AKST have the same time or HAST is 2 hours behind AKDT.

For most of the year, working hours of 9:00 am to 5:00 pm in HADT correspond to 10:00 am to 6:00 pm in AKDT. During seasonal clock changes, working hours of 9:00 am to 5:00 pm in HAST correspond to 10:00 am to 6:00 pm in AKST.

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

Time Difference

Hawaii-Aleutian Standard Time is 1 hour behind Alaska Standard Time
2:00 am02:00 in HAST is 3:00 am03:00 in AKST

HAST to AKST call time
Best time for a conference call or a meeting is between 9am-4pm in HAST which corresponds to 10am-5pm in AKST

2:00 am02:00 Hawaii-Aleutian Standard Time (HAST). Offset UTC -10:00 hours
3:00 am03:00 Alaska Standard Time (AKST). Offset UTC -9:00 hours

2:00 am02:00 HAST / 3:00 am03:00 AKST

HASTAKST
12am (midnight)1am
1am2am
2am3am
3am4am
4am5am
5am6am
6am7am
7am8am
8am9am
9am10am
10am11am
11am12pm (noon)
12pm (noon)1pm
1pm2pm
2pm3pm
3pm4pm
4pm5pm
5pm6pm
6pm7pm
7pm8pm
8pm9pm
9pm10pm
10pm11pm
11pm12am (midnight)
00:0001:00
01:0002:00
02:0003:00
03:0004:00
04:0005:00
05:0006:00
06:0007:00
07:0008:00
08:0009:00
09:0010:00
10:0011:00
11:0012:00
12:0013:00
13:0014:00
14:0015:00
15:0016:00
16:0017:00
17:0018:00
18:0019:00
19:0020:00
20:0021:00
21:0022:00
22:0023:00
23:0000:00

Hawaii-Aleutian Daylight Time

Offset: HADT is 9 hours behind Greenwich Mean Time (GMT) and is used in North America

Daylight Saving: Hawaii-Aleutian Daylight Time (HADT) is a daylight saving/summer time zone, but some places set clocks back one hour during winter and observe Hawaii-Aleutian Standard Time (HAST).

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Hawaii-Aleutian Daylight Time (HADT) ended on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am local standard time instead. Daylight saving ends annually on the first Sunday of November

Daylight saving time clock moves back for one hour from 2am to 1amStart: Hawaii-Aleutian Daylight Time (HADT) starts on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am. Daylight saving starts annually on the second Sunday of March

HADT 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 HADT
  • V - short form of 'Victor'
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) and is used in North America

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 291,826 people. Other major cities in this time zone include Fairbanks, Juneau, Eagle River, Badger.

AKST Time Zone Geo Map
AKST timezone map

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).

Daylight saving time clock moves back for one hour from 2am to 1amStart: Alaska Standard Time (AKST) started on Sunday, November 2, 2025 at 2:00 am local time and clocks were set one hour back to Sunday, November 2, 2025, 1:00 am. Standard time starts annually on the first Sunday of November.

Daylight saving time clock moves forward for one hour from 2am to 3amEnd: Alaska Standard Time (AKST) ends on Sunday, March 8, 2026 at 2:00 am local time and clocks are set one hour forward to Sunday, March 8, 2026, 3:00 am local daylight time instead. Standard time ends annually on the second Sunday of March.

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
EST to ISTGMT to ESTPST to ESTEST to GMTPST to GMT