Rhiannon Hendricks
Hawaii Standard Time (HST) is not adjusted for daylight saving, meaning it remains constant throughout the year. This is in contrast to some time zones, which switch the clock forward by one hour in the summer and backward by one hour in the winter. Eastern Daylight Time (EDT) is six hours ahead of HST. So, if it's 10 pm EDT on Wednesday, what time is it in Hawaii?
| Characteristics | Values |
|---|---|
| Eastern Daylight Time | 10:00 pm |
| Hawaii Standard Time | 4:00 pm |
| Time Difference | EDT is 6 hours ahead of HST |
| Daylight Saving | HST is not adjusted for daylight saving |
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What You'll Learn
Hawaii is 6 hours behind Eastern Daylight Time
Hawaii is six hours behind Eastern Daylight Time (EDT). This means that when it is 10 pm on Wednesday evening in the Eastern US, it is 4 pm the same day in Hawaii.
Hawaii Standard Time (HST) is not adjusted for daylight saving, so it remains the same throughout the year. This is in contrast to some time zones, such as EDT, where the clock is set forward by one hour every spring and backward by one hour every autumn to adjust for daylight saving.
As a result, when it is summer in the Eastern US, Hawaii is three hours behind; in the winter, when Eastern states are on Eastern Standard Time (EST), Hawaii is two hours behind.
This time difference is important to keep in mind when planning any calls or meetings between these time zones. For example, a conference call or meeting between 1 pm and 6 pm EDT would correspond to 8 am to 1 pm HST.
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Hawaii doesn't observe Daylight Saving
10 pm Eastern Time on Wednesday is 4 pm in Hawaii, which does not observe Daylight Saving.
Hawaii is one of the only two states in the US that does not use Daylight Saving Time (DST), the other being most of Arizona. Hawaii stopped using DST as far back as 1945. Its geographical location, being closer to the equator, means there is less variance in the total hours of daylight throughout the year. At the equator, there are 12 hours of day and night every day, while further away from the equator, there are six months of sunlight and six months of darkness.
Hawaii currently observes Hawaii Standard Time (HST) all year round. Its clocks do not change, unlike the majority of the rest of the United States. This means that for 34 weeks of the year (65% of the entire year), from the second Sunday in March to the first Sunday in November, Hawaii is three hours behind the west coast and six hours behind the east coast. For the remainder of the year, the time difference is two hours and five hours, respectively.
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10 pm Eastern Daylight Time is 4 am in Hawaii
When it is 10 pm Eastern Daylight Time, it is 4 am in Hawaii. This is because Hawaii Standard Time (HST) is UTC/GMT -10 hours, and Eastern Daylight Time (EDT) is UTC -4 hours.
Hawaii does not observe daylight saving, so HST remains constant throughout the year. In contrast, EDT is observed during the summer months in some places, where clocks are set forward by one hour from Eastern Standard Time (EST). In 2025, this change took place on the second Sunday of March, when clocks were set forward from 2 am EST to 3 am EDT.
The time difference between Hawaii and Eastern Time is, therefore, typically six hours, as demonstrated by the fact that Honolulu, Hawaii, is six hours behind Washington, DC. This means that when it is 10 pm in the Eastern Time Zone, it is 4 am in Hawaii.
To put this another way, when it is 10 am in Hawaii, it is 4 pm Eastern Time. This can be a useful way of thinking about the time difference when planning calls or meetings between these time zones.
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Hawaii Standard Time is also known as HST
10 pm Eastern Standard Time on Wednesday is 4 pm Hawaii Standard Time (HST) on the same day.
French Polynesia and the Cook Islands also use UTC−10:00 for their major cities, but they are not considered to be part of the Hawaii-Aleutian Time Zone, a term used specifically in the US. During standard time, most locations in North America are on HST, but a few observe Hawaii-Aleutian Daylight Time (HDT) instead.
Hawaii has not observed daylight saving time since 1945. Until 1947, UTC−10:30 was used as standard time in the state, but a new territorial law passed on June 8, 1947, moved Hawaiian Standard Time 30 minutes ahead. This change was implemented to maintain consistency in the scheduling of business and government activities across Hawaii and the Aleutian Islands.
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Eastern Standard Time is also known as EST
10 pm Eastern Standard Time on Wednesday in Hawaii would be 4 pm. This is because Eastern Standard Time (EST) is a time zone that is used in parts of North America, falling mostly along the east coast. It is observed in 23 states in the US, three provinces in Canada, and parts of Mexico, the Caribbean, and Central America. Almost half of the US population lives in the EST time zone.
In standard time (during late autumn and winter in North America), EST is five hours behind Coordinated Universal Time (UTC−05:00). When daylight saving time is observed (during spring, summer, and early autumn), Eastern Daylight Time (EDT) is followed, which is four hours behind Coordinated Universal Time (UTC−04:00).
The time in the EST zone is based on the mean solar time of the 75th meridian west of the Greenwich Observatory. In everyday usage, EST is often referred to as Eastern Time (ET) or the Eastern Time Zone. This can be confusing, as 'Eastern Time' does not differentiate between standard time and Daylight Saving Time, so it switches between EST and EDT depending on whether DST is being observed at a particular time of year.
The exact dates for the change between EST and EDT vary slightly year to year. However, generally, EST is observed from the first Sunday in November to the second Sunday in March, and EDT is used for the remainder of the year. On the second Sunday in March, at 2:00 a.m. EST, clocks are advanced to 3:00 a.m. EDT, creating a 23-hour day. On the first Sunday in November, at 2:00 a.m. EDT, clocks are moved back to 1:00 a.m. EST, resulting in a 25-hour day.
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Frequently asked questions
It is 4 pm in Hawaii. Eastern Daylight Time (EDT) is 6 hours ahead of Hawaii Standard Time (HST).
No, Hawaii Standard Time (HST) is not adjusted for daylight saving, so it remains the same throughout the year.
The best time for a meeting would be between 1 pm and 6 pm Eastern Time, which corresponds to 8 am to 1 pm in Hawaii.
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