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