GMT to JST converter

UK Time (GMT) is UTC+0 and observes British Summer Time (BST, UTC+1, roughly March–October). It covers London, Manchester and Edinburgh.

Japan Standard Time (JST) is UTC+9 with no daylight saving. It covers Tokyo, Osaka and Sapporo (Seoul shares the same clock).

Japan Standard Time is typically 9 hours ahead of UK Time, though daylight saving can shift the difference by an hour at some times of year.

Best time to call Japan Standard Time from UK Time

There's no 9-to-5 overlap between UK Time and Japan Standard Time — one side always has to flex. The practical slots: 7:00 AM in UK Time is 4:00 PM in Japan Standard Time. Daylight saving can shift these times by an hour at some points in the year.