Home   Time Zones   Abbreviations   HST – Hawaii Standard Time

HST – Hawaii Standard Time (Standard Time)

Also known as: HAST – Hawaii-Aleutian Standard Time

North America: Most locations are on HST, but a few locations are still observing HDT.

Please use the search field on the right to find the correct local time in any city.

Time zone map of HST
Currently observing HST.
Observes HST part of the year.
Areas with same time currently (UTC -10).
Currently observing HST – Hawaii Standard Time.
Observes HST – Hawaii Standard Time part of the year, but not currently.
Currently has same time zone offset as HST (UTC -10) but different time zone name.

Hawaii Standard Time (HST) is 10 hours behind Coordinated Universal Time (UTC). This time zone is in use during standard time in: North America, Pacific.

See full time zone map

Summer Time & DST

Some places observe daylight saving time/summer time during the summer, and therefore use HDT (Hawaii-Aleutian Daylight Time) in the summer.

Email Time Zone Indicator: -1000

An email sent from someone in the Hawaii Standard Time (HST) time zone will have the time zone listed as "-1000" in the headers of the email. (However, "-1000" does not have to be in Hawaii Standard Time, as other time zones could have the same UTC offset).

Where and When is HST Observed?

North America

U.S. states using HST in the winter and HDT in the summer:

  • Alaska - Aleutian Islands west of 169.30 West (east of 169.30 West use AKST/AKDT)

U.S. states using HST all year:

  • Hawaii

Other Time Zones in UTC -10

Some time zones exist that have the same offset as HST, but can be found under a different name:

HST time now


Tuesday, June 18, 2019

  • HST is currently observed in Honolulu
  • HST will be observed in Adak starting from Nov 3, 2019 at 2:00 am
  • UTC Offset: UTC -10
  • 6 hours behind Washington DC


Find current time and time zone by city

Example cities

USA – Honolulu (All Year)
USA – Adak (Winter)
USA – Hilo (All Year)
USA – Palmyra Atoll (All Year)

Related time zones

HDT – Hawaii-Aleutian Daylight Time (Daylight Time)

Time Zone Map with DST

Time zone map

Time Zone Map

You might also like

June Solstice

June Solstice

The June solstice is the longest day of the year in the Northern Hemisphere & the shortest day in the Southern Hemisphere. more

Commuters and tourists in Canary Wharf, London, United Kingdom.

Daylight Saving Time (DST)

Daylight Saving Time (DST) is the practice of setting the clocks forward one hour from standard time during the summer months, and back again in the fall, in order to make better use of natural daylight. more

Calendar with 12 months

12 Months of the Year

The 12 months of the year are linked to the Moon's orbit around Earth. Why are there 12 months? What do the month names mean? more