EDT to HST Time Converter
HST is 6 hours behind EDT. EDT is UTC-4:00, and HST is UTC-10:00.
Best Time to Call Between EDT and HST
Both zones are inside normal business hours between 3:00 PM and 5:00 PM EDT — that's 9:00 AM to 11:00 AM HST. That's a 2-hour window.
both at work EDT only HST only neither — hours along the strip are EDT.
Common Times Converted
EDT on the left, HST on the right.
EDT to HST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| EDT | HST | Working hours |
|---|---|---|
| 12:00 AM | 6:00 PM prev day | — |
| 1:00 AM | 7:00 PM prev day | — |
| 2:00 AM | 8:00 PM prev day | — |
| 3:00 AM | 9:00 PM prev day | — |
| 4:00 AM | 10:00 PM prev day | — |
| 5:00 AM | 11:00 PM prev day | — |
| 6:00 AM | 12:00 AM | — |
| 7:00 AM | 1:00 AM | — |
| 8:00 AM | 2:00 AM | — |
| 9:00 AM | 3:00 AM | EDT only |
| 10:00 AM | 4:00 AM | EDT only |
| 11:00 AM | 5:00 AM | EDT only |
| 12:00 PM | 6:00 AM | EDT only |
| 1:00 PM | 7:00 AM | EDT only |
| 2:00 PM | 8:00 AM | EDT only |
| 3:00 PM | 9:00 AM | Both zones |
| 4:00 PM | 10:00 AM | Both zones |
| 5:00 PM | 11:00 AM | HST only |
| 6:00 PM | 12:00 PM | HST only |
| 7:00 PM | 1:00 PM | HST only |
| 8:00 PM | 2:00 PM | HST only |
| 9:00 PM | 3:00 PM | HST only |
| 10:00 PM | 4:00 PM | HST only |
| 11:00 PM | 5:00 PM | — |
What EDT and HST Actually Are
EDT — Eastern Daylight Time
New York, Toronto, Washington DC, Atlanta, Miami, Boston. Standing at UTC-4:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to EST.
EDT runs from the second Sunday in March to the first Sunday in November — about eight months, making the "daylight" version the majority of the year rather than the exception.
HST — Hawaii Standard Time
Honolulu and the rest of Hawaii. Standing at UTC-10:00 as written, and the region does not change its clocks, so that offset holds all year. Hawaii does not observe daylight saving, so this offset holds all year.
Hawaii dropped daylight saving in 1967 and never resumed it. Being close to the equator, its daylight barely varies across the year, so there is little to gain.
What This Means in Practice
This gap is not fixed
EDT changes its clocks and HST does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, November 1, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on EDT
Cities on HST
Frequently Asked Questions
What is the time difference between EDT and HST?
HST is 6 hours behind EDT.
What is 9:00 AM EDT in HST?
9:00 AM EDT is 3:00 AM HST.
What are the best hours to schedule a call between EDT and HST?
Between 3:00 PM and 5:00 PM EDT, which is 9:00 AM to 11:00 AM HST. Both sides are inside normal business hours through that window.
Does the difference between EDT and HST change during the year?
Yes. EDT observes daylight saving and HST does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.
Does HST always mean Hawaii Standard Time?
Hawaii does not observe daylight saving, so this offset holds all year.