HDT to HAST Converter
HST/HDT
Hawaii Standard Time
GMT -10
HDT automatically adjusted to HST time zone, that is in use
HAST
Hawaii-Aleutian Standard Time
GMT -10
Time Difference
Hawaii Standard Time is 0 hours ahead of Hawaii-Aleutian Standard Time
12:00 am00:00 in HST is 12:00 am00:00 in HAST
HDT to HAST call time
Best time for a conference call or a meeting is between 9am-6pm in HDT which corresponds to 8am-5pm in HAST
12:00 am00:00 Hawaii Standard Time (HST). Offset UTC -10:00 hours
12:00 am00:00 Hawaii-Aleutian Standard Time (HAST). Offset UTC -10:00 hours
12:00 am00:00 HST / 12:00 am00:00 HAST
| HST | HAST |
|---|---|
| 12am (midnight) | 12am (midnight) |
| 1am | 1am |
| 2am | 2am |
| 3am | 3am |
| 4am | 4am |
| 5am | 5am |
| 6am | 6am |
| 7am | 7am |
| 8am | 8am |
| 9am | 9am |
| 10am | 10am |
| 11am | 11am |
| 12pm (noon) | 12pm (noon) |
| 1pm | 1pm |
| 2pm | 2pm |
| 3pm | 3pm |
| 4pm | 4pm |
| 5pm | 5pm |
| 6pm | 6pm |
| 7pm | 7pm |
| 8pm | 8pm |
| 9pm | 9pm |
| 10pm | 10pm |
| 11pm | 11pm |
| 0:00 | 0:00 |
| 1:00 | 1:00 |
| 2:00 | 2:00 |
| 3:00 | 3:00 |
| 4:00 | 4:00 |
| 5:00 | 5:00 |
| 6:00 | 6:00 |
| 7:00 | 7:00 |
| 8:00 | 8:00 |
| 9:00 | 9:00 |
| 10:00 | 10:00 |
| 11:00 | 11:00 |
| 12:00 | 12:00 |
| 13:00 | 13:00 |
| 14:00 | 14:00 |
| 15:00 | 15:00 |
| 16:00 | 16:00 |
| 17:00 | 17:00 |
| 18:00 | 18:00 |
| 19:00 | 19:00 |
| 20:00 | 20:00 |
| 21:00 | 21:00 |
| 22:00 | 22:00 |
| 23:00 | 23:00 |
Hawaii Daylight Time
Offset: HDT is 9 hours behind Greenwich Mean Time (GMT) and is used in Pacific
Countries: It is used in following countries: United States
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 nine hour and zero minutes time differences 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
Hawaii-Aleutian Standard Time
Offset: HAST is 10 hours behind Greenwich Mean Time (GMT) and is used in North America
HAST 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 ten hour and zero minutes time differences to the west of the zero meridian.
Military/NATO: Used by the U.S. military, Chinese military and others
- Whiskey - Military abbreviation for HAST
- 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