PDT to HST Time Converter
HST is 3 hours behind PDT. PDT is UTC-7:00, and HST is UTC-10:00.
Best Time to Call Between PDT and HST
Both zones are inside normal business hours between 12:00 PM and 5:00 PM PDT — that's 9:00 AM to 2:00 PM HST. That's a 5-hour window.
both at work PDT only HST only neither — hours along the strip are PDT.
Common Times Converted
PDT on the left, HST on the right.
PDT to HST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| PDT | HST | Working hours |
|---|---|---|
| 12:00 AM | 9:00 PM prev day | — |
| 1:00 AM | 10:00 PM prev day | — |
| 2:00 AM | 11:00 PM prev day | — |
| 3:00 AM | 12:00 AM | — |
| 4:00 AM | 1:00 AM | — |
| 5:00 AM | 2:00 AM | — |
| 6:00 AM | 3:00 AM | — |
| 7:00 AM | 4:00 AM | — |
| 8:00 AM | 5:00 AM | — |
| 9:00 AM | 6:00 AM | PDT only |
| 10:00 AM | 7:00 AM | PDT only |
| 11:00 AM | 8:00 AM | PDT only |
| 12:00 PM | 9:00 AM | Both zones |
| 1:00 PM | 10:00 AM | Both zones |
| 2:00 PM | 11:00 AM | Both zones |
| 3:00 PM | 12:00 PM | Both zones |
| 4:00 PM | 1:00 PM | Both zones |
| 5:00 PM | 2:00 PM | HST only |
| 6:00 PM | 3:00 PM | HST only |
| 7:00 PM | 4:00 PM | HST only |
| 8:00 PM | 5:00 PM | — |
| 9:00 PM | 6:00 PM | — |
| 10:00 PM | 7:00 PM | — |
| 11:00 PM | 8:00 PM | — |
What PDT and HST Actually Are
PDT — Pacific Daylight Time
Los Angeles, San Francisco, Seattle, Vancouver. Standing at UTC-7:00 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 PST.
PDT covers the eight months when the US West Coast is seven hours behind UTC rather than eight.
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
PDT 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 PDT
Cities on HST
Frequently Asked Questions
What is the time difference between PDT and HST?
HST is 3 hours behind PDT.
What is 9:00 AM PDT in HST?
9:00 AM PDT is 6:00 AM HST.
What are the best hours to schedule a call between PDT and HST?
Between 12:00 PM and 5:00 PM PDT, which is 9:00 AM to 2:00 PM HST. Both sides are inside normal business hours through that window.
Does the difference between PDT and HST change during the year?
Yes. PDT 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.