GMT to PDT Time Converter
PDT is 8 hours behind GMT. The UK and Ireland are currently on BST (UTC+1:00), and PDT is UTC-7:00.
Best Time to Call Between GMT and PDT
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 GMT, which is 7:00 AM to 2:00 PM PDT.
both at work GMT only PDT only neither — hours along the strip are GMT.
Common Times Converted
GMT on the left, PDT on the right.
GMT to PDT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| GMT | PDT | Working hours |
|---|---|---|
| 12:00 AM | 4:00 PM prev day | PDT 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 | GMT only |
| 10:00 AM | 2:00 AM | GMT only |
| 11:00 AM | 3:00 AM | GMT only |
| 12:00 PM | 4:00 AM | GMT only |
| 1:00 PM | 5:00 AM | GMT only |
| 2:00 PM | 6:00 AM | GMT only |
| 3:00 PM | 7:00 AM | GMT only |
| 4:00 PM | 8:00 AM | GMT only |
| 5:00 PM | 9:00 AM | PDT only |
| 6:00 PM | 10:00 AM | PDT only |
| 7:00 PM | 11:00 AM | PDT only |
| 8:00 PM | 12:00 PM | PDT only |
| 9:00 PM | 1:00 PM | PDT only |
| 10:00 PM | 2:00 PM | PDT only |
| 11:00 PM | 3:00 PM | PDT only |
What GMT and PDT Actually Are
GMT — Greenwich Mean Time
The UK and Ireland in winter, plus Iceland, Portugal and much of West Africa. Standing at UTC 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. Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.
Britain ran an experiment from 1968 to 1971 on permanent UTC+1, abandoning GMT entirely. It was scrapped after complaints about dark winter mornings in Scotland.
PDT — Pacific Daylight Time
Los Angeles, San Francisco, Seattle, Vancouver. Standing at UTC-7:00 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.
PDT covers the eight months when the US West Coast is seven hours behind UTC rather than eight.
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 GMT
Cities on PDT
Frequently Asked Questions
What is the time difference between GMT and PDT?
PDT is 8 hours behind GMT. That is the live figure. Taken strictly as written, the gap between GMT and PDT is 7 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM GMT in PDT?
9:00 AM GMT is 1:00 AM PDT.
What are the best hours to schedule a call between GMT and PDT?
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 GMT, which is 7:00 AM to 2:00 PM PDT.
Does the difference between GMT and PDT 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 GMT always mean Greenwich Mean Time?
Often used loosely as a synonym for UTC. They differ by less than a second, so for scheduling they are interchangeable.