BST to PST

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BST is the UK's summer offset (UTC+1); in winter the UK is on GMT. See that conversion →

PST is the standard (winter) offset for US Pacific. From mid-March to early November those clocks run on PDT (UTC−7) for daylight saving.

What is the BST to PST time difference?

PST is 9 hours behind BST. BST is British Summer Time at a fixed UTC+1, and PST is Pacific Standard Time at UTC−8. Because both are named constant offsets rather than city clocks, the gap does not move — the 24-hour table above reads the same every day of the year. To convert by hand, subtract 9 hours from the BST time.

What time is 9 AM BST in PST?

9 AM BST is 12:00 AM PST. That follows from the gap of 9 hours between UTC+1 and UTC−8, so every BST hour moves by the same amount. The full 24-hour table above lists every hour, so you can convert any BST time to PST at a glance. Because both are fixed offsets, that mapping is identical on any date — there is no daylight-saving exception to remember.

Is BST ahead of or behind PST?

PST is 9 hours behind BST, which is the same as saying BST is 9 hours ahead of PST. That comes straight from the two offsets: UTC+1 for BST against UTC−8 for PST. So at the same instant, 9:00 AM on BST reads 12:00 AM on PST. Both are fixed named offsets, so the direction and the size of that gap hold all year.

Does BST to PST change with daylight saving?

The BST↔PST offset itself never changes: UTC+1 to UTC−8 is a constant 9 hours gap. Note: BST is the UK's summer offset (UTC+1); in winter the UK is on GMT. PST is the standard (winter) offset for US Pacific. From mid-March to early November those clocks run on PDT (UTC−7) for daylight saving. What can change is which abbreviation a region is using at a given date, which is why the notes above link across to the matching conversion. Converting between the named offsets themselves, as this page does, is the same arithmetic on every day of the year.