BST to PET Time Converter
PET is 6 hours behind BST. BST is UTC+1:00, and PET is UTC-5:00.
Best Time to Call Between BST and PET
Both zones are inside normal business hours between 3:00 PM and 5:00 PM BST — that's 9:00 AM to 11:00 AM PET. That's a 2-hour window.
both at work BST only PET only neither — hours along the strip are BST.
Common Times Converted
BST on the left, PET on the right.
BST to PET: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BST | PET | 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 | BST only |
| 10:00 AM | 4:00 AM | BST only |
| 11:00 AM | 5:00 AM | BST only |
| 12:00 PM | 6:00 AM | BST only |
| 1:00 PM | 7:00 AM | BST only |
| 2:00 PM | 8:00 AM | BST only |
| 3:00 PM | 9:00 AM | Both zones |
| 4:00 PM | 10:00 AM | Both zones |
| 5:00 PM | 11:00 AM | PET only |
| 6:00 PM | 12:00 PM | PET only |
| 7:00 PM | 1:00 PM | PET only |
| 8:00 PM | 2:00 PM | PET only |
| 9:00 PM | 3:00 PM | PET only |
| 10:00 PM | 4:00 PM | PET only |
| 11:00 PM | 5:00 PM | — |
What BST and PET Actually Are
BST — British Summer Time
London, Manchester, Birmingham, Glasgow, and the rest of the UK from late March to late October. Standing at UTC+1:00 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, October 25, 2026, to GMT. BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.
British Summer Time began in 1916 as a wartime fuel-saving measure and has run every year since, making it one of the oldest continuous daylight saving schemes in the world.
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
This gap is not fixed
BST changes its clocks and PET 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, October 25, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on BST
Cities on PET
Frequently Asked Questions
What is the time difference between BST and PET?
PET is 6 hours behind BST.
What is 9:00 AM BST in PET?
9:00 AM BST is 3:00 AM PET.
What are the best hours to schedule a call between BST and PET?
Between 3:00 PM and 5:00 PM BST, which is 9:00 AM to 11:00 AM PET. Both sides are inside normal business hours through that window.
Does the difference between BST and PET change during the year?
Yes. BST observes daylight saving and PET does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, October 25, 2026.
Does BST always mean British Summer Time?
BST also stands for Bangladesh Standard Time (UTC+6). BDT is the clearer label for that one.