PET to HST Time Converter
HST is 5 hours behind PET. PET is UTC-5:00, and HST is UTC-10:00.
Best Time to Call Between PET and HST
Both zones are inside normal business hours between 2:00 PM and 5:00 PM PET — that's 9:00 AM to 12:00 PM HST. That's a 3-hour window.
both at work PET only HST only neither — hours along the strip are PET.
Common Times Converted
PET on the left, HST on the right.
PET to HST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| PET | HST | Working hours |
|---|---|---|
| 12:00 AM | 7:00 PM prev day | — |
| 1:00 AM | 8:00 PM prev day | — |
| 2:00 AM | 9:00 PM prev day | — |
| 3:00 AM | 10:00 PM prev day | — |
| 4:00 AM | 11:00 PM prev day | — |
| 5:00 AM | 12:00 AM | — |
| 6:00 AM | 1:00 AM | — |
| 7:00 AM | 2:00 AM | — |
| 8:00 AM | 3:00 AM | — |
| 9:00 AM | 4:00 AM | PET only |
| 10:00 AM | 5:00 AM | PET only |
| 11:00 AM | 6:00 AM | PET only |
| 12:00 PM | 7:00 AM | PET only |
| 1:00 PM | 8:00 AM | PET only |
| 2:00 PM | 9:00 AM | Both zones |
| 3:00 PM | 10:00 AM | Both zones |
| 4:00 PM | 11:00 AM | Both zones |
| 5:00 PM | 12:00 PM | HST only |
| 6:00 PM | 1:00 PM | HST only |
| 7:00 PM | 2:00 PM | HST only |
| 8:00 PM | 3:00 PM | HST only |
| 9:00 PM | 4:00 PM | HST only |
| 10:00 PM | 5:00 PM | — |
| 11:00 PM | 6:00 PM | — |
What PET and HST Actually Are
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.
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
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 PET
Cities on HST
Frequently Asked Questions
What is the time difference between PET and HST?
HST is 5 hours behind PET.
What is 9:00 AM PET in HST?
9:00 AM PET is 4:00 AM HST.
What are the best hours to schedule a call between PET and HST?
Between 2:00 PM and 5:00 PM PET, which is 9:00 AM to 12:00 PM HST. Both sides are inside normal business hours through that window.
Does the difference between PET and HST 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.