BST to PT Time Converter
PT is 8 hours behind BST. BST is UTC+1:00, and The US West Coast is currently on PDT (UTC-7:00).
Best Time to Call Between BST and PT
Standard 9-to-5 hours in these two zones never overlap, so someone has to take the call outside their working day. The most workable window is 3:00 PM to 10:00 PM BST, which is 7:00 AM to 2:00 PM PT.
both at work BST only PT only neither — hours along the strip are BST.
Common Times Converted
BST on the left, PT on the right.
BST to PT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BST | PT | Working hours |
|---|---|---|
| 12:00 AM | 4:00 PM prev day | PT only |
| 1:00 AM | 5:00 PM prev day | — |
| 2:00 AM | 6:00 PM prev day | — |
| 3:00 AM | 7:00 PM prev day | — |
| 4:00 AM | 8:00 PM prev day | — |
| 5:00 AM | 9:00 PM prev day | — |
| 6:00 AM | 10:00 PM prev day | — |
| 7:00 AM | 11:00 PM prev day | — |
| 8:00 AM | 12:00 AM | — |
| 9:00 AM | 1:00 AM | BST only |
| 10:00 AM | 2:00 AM | BST only |
| 11:00 AM | 3:00 AM | BST only |
| 12:00 PM | 4:00 AM | BST only |
| 1:00 PM | 5:00 AM | BST only |
| 2:00 PM | 6:00 AM | BST only |
| 3:00 PM | 7:00 AM | BST only |
| 4:00 PM | 8:00 AM | BST only |
| 5:00 PM | 9:00 AM | PT only |
| 6:00 PM | 10:00 AM | PT only |
| 7:00 PM | 11:00 AM | PT only |
| 8:00 PM | 12:00 PM | PT only |
| 9:00 PM | 1:00 PM | PT only |
| 10:00 PM | 2:00 PM | PT only |
| 11:00 PM | 3:00 PM | PT only |
What BST and PT 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.
PT — Pacific Time
Los Angeles, San Francisco, Seattle, Las Vegas, Vancouver. Standing at UTC-8:00 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.
Pacific Time anchors the US technology industry, so a great deal of software and scheduling convention is written implicitly around it.
What This Means in Practice
Both sides change clocks, on different dates
Both regions observe daylight saving but do not switch on the same day, so for a week or two each spring and fall the gap between them is an hour different from the rest of the year. Those short windows are where recurring invitations quietly break.
Major Cities in Each Zone
Cities on BST
Cities on PT
Frequently Asked Questions
What is the time difference between BST and PT?
PT is 8 hours behind BST. That is the live figure. Taken strictly as written, the gap between BST and PT is 9 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM BST in PT?
9:00 AM BST is 1:00 AM PT.
What are the best hours to schedule a call between BST and PT?
Standard business hours in these two zones do not overlap at all, so one side has to work outside the 9-to-5. The most workable window is 3:00 PM to 10:00 PM BST, which is 7:00 AM to 2:00 PM PT.
Does the difference between BST and PT change during the year?
Yes. Both regions observe daylight saving, and they do not switch on the same dates, 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.