If it is 8.30am PDT (Pacific Daylight Time - a time zone that covers the west cost of America) then in GMT (Greenwich Mean Time) it will be 3.30pm.
However, at this time of year where BST is being used (British Summer Time), it will be 4.30pm. This is because daylight saving applies mid-year in Britain, and the clocks are forwarded an hour towards the end of the spring months.
At 'normal' times of the year, PDT is 7 hours behind GMT. So 10pm PDT would be 5am GMT, and 5.43pm PDT would be 12.43am GMT.
However, at this time of year where BST is being used (British Summer Time), it will be 4.30pm. This is because daylight saving applies mid-year in Britain, and the clocks are forwarded an hour towards the end of the spring months.
At 'normal' times of the year, PDT is 7 hours behind GMT. So 10pm PDT would be 5am GMT, and 5.43pm PDT would be 12.43am GMT.