GMT to PST
London to Los Angeles.
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All date & timeQuestions
What time is PST when it is 12:00 GMT?
04:00. Pacific Time is 8 hours behind Greenwich Mean Time, all year round. There is no hour of the standard working day that is inside 9-to-5 in both London and Los Angeles. One side has to take the call outside office hours, so it is worth agreeing which.
Is the difference between GMT and PST the same all year?
Yes. Pacific Time is 8 hours behind Greenwich Mean Time, all year round. Both zones change their clocks, and close enough to the same dates that the gap between them holds — apart from a week or two each spring and autumn when one has shifted and the other has not.
What do GMT and PST actually stand for?
GMT is Greenwich Mean Time, the zone covering London, currently UTC+0 in January. PST is Pacific Time, covering Los Angeles, at UTC−8. GMT and UK time are the same thing only in winter. From late March to late October London runs on British Summer Time, an hour ahead of GMT, so a meeting booked as 'GMT' with someone in London is an hour out for most of the year.
Anything worth knowing about Pacific Time?
Pacific Time runs three hours behind the US east coast, which is why a 9am meeting on the east coast is a 6am meeting here — the single most common scheduling complaint in North American business.
When is a good time to call between London and Los Angeles?
There is no hour of the standard working day that is inside 9-to-5 in both London and Los Angeles. One side has to take the call outside office hours, so it is worth agreeing which. If the call has to happen outside that, the fairer arrangement is usually to alternate which side takes the awkward hour rather than always asking the same one.
How it works, and more about gmt → pst
The difference, and whether you can rely on it
In January, Pacific Time is 8 hours behind Greenwich Mean Time — UTC+0 against UTC−8. It stays that way all year, so the number is worth memorising if you work across these two often.
When you can both be at a desk
There is no hour inside 9-to-5 in both London and Los Angeles. Whatever you schedule, one side is taking it outside working hours — so the useful question is not when to meet but who absorbs the inconvenience, and whether it alternates.
Reading the abbreviations literally will mislead you
GMT strictly means one fixed offset, but almost nobody uses it that way. People write it to mean the time in London, which shifts if that city observes daylight saving — and it does. This page follows the common usage rather than the strict one, because the strict reading gives an answer that is wrong for a good part of the year.
GMT and UK time are the same thing only in winter. From late March to late October London runs on British Summer Time, an hour ahead of GMT, so a meeting booked as 'GMT' with someone in London is an hour out for most of the year. Pacific Time runs three hours behind the US east coast, which is why a 9am meeting on the east coast is a 6am meeting here — the single most common scheduling complaint in North American business.
Scheduling something recurring
For a one-off, the converter above is the whole job. For a standing meeting across zones it is worth putting the invitation in a calendar that stores the zone rather than the time — then the changeover is handled for you and nobody has to remember. If you are trying to find a slot across more than two places at once, the meeting planner shows a whole day at a glance instead.