HST to EST Time Converter
EST is 6 hours ahead of HST. HST is UTC-10:00, and The US East Coast is currently on EDT (UTC-4:00).
Best Time to Call Between HST and EST
Both zones are inside normal business hours between 9:00 AM and 11:00 AM HST — that's 3:00 PM to 5:00 PM EST. That's a 2-hour window.
both at work HST only EST only neither — hours along the strip are HST.
Common Times Converted
HST on the left, EST on the right.
HST to EST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| HST | EST | Working hours |
|---|---|---|
| 12:00 AM | 6:00 AM | — |
| 1:00 AM | 7:00 AM | — |
| 2:00 AM | 8:00 AM | — |
| 3:00 AM | 9:00 AM | EST only |
| 4:00 AM | 10:00 AM | EST only |
| 5:00 AM | 11:00 AM | EST only |
| 6:00 AM | 12:00 PM | EST only |
| 7:00 AM | 1:00 PM | EST only |
| 8:00 AM | 2:00 PM | EST only |
| 9:00 AM | 3:00 PM | Both zones |
| 10:00 AM | 4:00 PM | Both zones |
| 11:00 AM | 5:00 PM | HST only |
| 12:00 PM | 6:00 PM | HST only |
| 1:00 PM | 7:00 PM | HST only |
| 2:00 PM | 8:00 PM | HST only |
| 3:00 PM | 9:00 PM | HST only |
| 4:00 PM | 10:00 PM | HST only |
| 5:00 PM | 11:00 PM | — |
| 6:00 PM | 12:00 AM next day | — |
| 7:00 PM | 1:00 AM next day | — |
| 8:00 PM | 2:00 AM next day | — |
| 9:00 PM | 3:00 AM next day | — |
| 10:00 PM | 4:00 AM next day | — |
| 11:00 PM | 5:00 AM next day | — |
What HST and EST Actually Are
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.
EST — Eastern Standard Time
New York, Toronto, Washington DC, Atlanta, Miami, Boston. Standing at UTC-5:00 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. Australia also uses EST for its own Eastern Standard Time (UTC+10), now more often written AEST.
Eastern Standard Time is only actually in force from early November to mid-March. For the other eight months the same region is on EDT, which is why so many EST conversions are quietly wrong.
What This Means in Practice
This gap is not fixed
EST 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 HST
Cities on EST
Frequently Asked Questions
What is the time difference between HST and EST?
EST is 6 hours ahead of HST. That is the live figure. Taken strictly as written, the gap between HST and EST is 5 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM HST in EST?
9:00 AM HST is 3:00 PM EST.
What are the best hours to schedule a call between HST and EST?
Between 9:00 AM and 11:00 AM HST, which is 3:00 PM to 5:00 PM EST. Both sides are inside normal business hours through that window.
Does the difference between HST and EST change during the year?
Yes. EST 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.
Does EST always mean Eastern Standard Time?
Australia also uses EST for its own Eastern Standard Time (UTC+10), now more often written AEST.