GMT to HAST Converter
Quick answers
GMT is 10 hours ahead of HAST year-round.
Working hours of 9:00 am to 5:00 pm in GMT correspond to 11:00 pm (previous day) to 7:00 am in HAST.
For example, 12:00 pm GMT is 2:00 am HAST. Use the converter above to adjust the date or time and create a shareable meeting link.
Best meeting overlap: 5:30pm-6:30pm GMT, which is 7:30am-8:30am HAST.
Compare GMT time with HAST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 10 hours ahead of Hawaii-Aleutian Standard Time
12:00 pm12:00 in GMT is 2:00 am02:00 in HAST
GMT to HAST call time
Best time for a conference call or a meeting is between 5:30pm-6:30pm in GMT which corresponds to 7:30am-8:30am in HAST
12:00 pm12:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
2:00 am02:00 Hawaii-Aleutian Standard Time (HAST). Offset UTC -10:00 hours
12:00 pm12:00 GMT / 2:00 am02:00 HAST
| GMT | HAST |
|---|---|
| 12am (midnight) | 2pm |
| 1am | 3pm |
| 2am | 4pm |
| 3am | 5pm |
| 4am | 6pm |
| 5am | 7pm |
| 6am | 8pm |
| 7am | 9pm |
| 8am | 10pm |
| 9am | 11pm |
| 10am | 12am (midnight) |
| 11am | 1am |
| 12pm (noon) | 2am |
| 1pm | 3am |
| 2pm | 4am |
| 3pm | 5am |
| 4pm | 6am |
| 5pm | 7am |
| 6pm | 8am |
| 7pm | 9am |
| 8pm | 10am |
| 9pm | 11am |
| 10pm | 12pm (noon) |
| 11pm | 1pm |
| 00:00 | 14:00 |
| 01:00 | 15:00 |
| 02:00 | 16:00 |
| 03:00 | 17:00 |
| 04:00 | 18:00 |
| 05:00 | 19:00 |
| 06:00 | 20:00 |
| 07:00 | 21:00 |
| 08:00 | 22:00 |
| 09:00 | 23:00 |
| 10:00 | 00:00 |
| 11:00 | 01:00 |
| 12:00 | 02:00 |
| 13:00 | 03:00 |
| 14:00 | 04:00 |
| 15:00 | 05:00 |
| 16:00 | 06:00 |
| 17:00 | 07:00 |
| 18:00 | 08:00 |
| 19:00 | 09:00 |
| 20:00 | 10:00 |
| 21:00 | 11:00 |
| 22:00 | 12:00 |
| 23:00 | 13:00 |
Greenwich Mean Time
Offset: GMT is 0 hours ahead Greenwich Mean Time (GMT) and is used in Europe
Countries using this time zone: Burkina Faso, Côte d'Ivoire, Britain (UK), Guernsey, Ghana, Greenland, Gambia, Guinea, Guinea-Bissau, Ireland, Isle of Man, Iceland, Jersey, Liberia, Mali, Mauritania, St Helena, Sierra Leone, Senegal, Sao Tome & Principe, Togo
Principal Cities: The largest city in the GMT time zone is London in United Kingdom, with about 7.557 million people. Other major cities in this time zone include Abidjan, Dakar, Grand Dakar, Accra.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use for the most parts it is the same. In military GMT is known as Zulu time.Greenwich Mean Time was the same as Universal Time (UT), until the introduction of UTC in 1972 a standard astronomical concept used in many technical fields.
GMT representations, usage and related time zones
- Z - is the zone designator for the zero UTC/GMT offset, also known as 'Zulu' time
- +00 - basic short
- +0000 - basic
- +00:00 - extended
- +0000 - sign character (+) followed by a four digit time providing hours (00) and minutes (00) of the offset. Indicates the zero UTC/GMT offset.
- Zulu - Military abbreviation for GMT
- Z - short form of 'Zulu'
- Africa/Abidjan
- Africa/Accra
- Africa/Bamako
- Africa/Banjul
- Africa/Bissau
- Africa/Conakry
- Africa/Dakar
- Africa/Freetown
- Africa/Lome
- Africa/Monrovia
- Africa/Nouakchott
- Africa/Ouagadougou
- Africa/Sao_Tome
- Africa/Timbuktu
- America/Danmarkshavn
- Atlantic/Reykjavik
- Atlantic/St_Helena
- Eire
- Etc/GMT
- Etc/GMT+0
- Etc/GMT-0
- Etc/GMT0
- Etc/Greenwich
- Europe/Belfast
- Europe/Dublin
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- GMT
- GMT+0
- GMT-0
- GMT0
- Greenwich
- Iceland
- EGST - Eastern Greenland Summer Time
- GMT - Greenwich Mean Time
- WET - Western European Time
- AZOST - Azores Summer Time
- UTC - Universal Time Coordinated
- WT - Western Sahara Standard Time
- Z - Zulu Time Zone
Hawaii-Aleutian Standard Time
Offset: HAST is 10 hours behind Greenwich Mean Time (GMT) and is used in America
Countries using this time zone: United States
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Hawaii-Aleutian Daylight Time (HADT).
Start: Hawaii-Aleutian Standard Time (HAST) 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.
End: Hawaii-Aleutian Standard Time (HAST) 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.
HAST 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 HAST
- 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