HST to PET Time Converter
PET is 5 hours ahead of HST. HST is UTC-10:00, and PET is UTC-5:00.
Best Time to Call Between HST and PET
Both zones are inside normal business hours between 9:00 AM and 12:00 PM HST — that's 2:00 PM to 5:00 PM PET. That's a 3-hour window.
both at work HST only PET only neither — hours along the strip are HST.
Common Times Converted
HST on the left, PET on the right.
HST to PET: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| HST | PET | Working hours |
|---|---|---|
| 12:00 AM | 5:00 AM | — |
| 1:00 AM | 6:00 AM | — |
| 2:00 AM | 7:00 AM | — |
| 3:00 AM | 8:00 AM | — |
| 4:00 AM | 9:00 AM | PET only |
| 5:00 AM | 10:00 AM | PET only |
| 6:00 AM | 11:00 AM | PET only |
| 7:00 AM | 12:00 PM | PET only |
| 8:00 AM | 1:00 PM | PET only |
| 9:00 AM | 2:00 PM | Both zones |
| 10:00 AM | 3:00 PM | Both zones |
| 11:00 AM | 4:00 PM | Both zones |
| 12:00 PM | 5:00 PM | HST only |
| 1:00 PM | 6:00 PM | HST only |
| 2:00 PM | 7:00 PM | HST only |
| 3:00 PM | 8:00 PM | HST only |
| 4:00 PM | 9:00 PM | HST only |
| 5:00 PM | 10:00 PM | — |
| 6:00 PM | 11:00 PM | — |
| 7:00 PM | 12:00 AM next day | — |
| 8:00 PM | 1:00 AM next day | — |
| 9:00 PM | 2:00 AM next day | — |
| 10:00 PM | 3:00 AM next day | — |
| 11:00 PM | 4:00 AM next day | — |
What HST and PET 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.
PET — Peru Time
Lima, Arequipa, Trujillo. Standing at UTC-5:00 as written, and the region does not change its clocks, so that offset holds all year.
Peru sits at UTC-5 year-round despite spanning longitudes that would suggest otherwise, and has not used daylight saving since a short trial in the 1990s.
What This Means in Practice
A gap you can rely on
Neither region changes its clocks, so this difference holds every day of the year. A recurring meeting booked once stays correct — worth knowing, because most cross-border pairs cannot say that.
Major Cities in Each Zone
Cities on HST
Cities on PET
Frequently Asked Questions
What is the time difference between HST and PET?
PET is 5 hours ahead of HST.
What is 9:00 AM HST in PET?
9:00 AM HST is 2:00 PM PET.
What are the best hours to schedule a call between HST and PET?
Between 9:00 AM and 12:00 PM HST, which is 2:00 PM to 5:00 PM PET. Both sides are inside normal business hours through that window.
Does the difference between HST and PET change during the year?
No. Neither region changes its clocks, so this gap is fixed all year round.
Does HST always mean Hawaii Standard Time?
Hawaii does not observe daylight saving, so this offset holds all year.