Working-hour overlap
When both cities are at work
There is no full hour when both cities are inside a standard 09:00–17:00 working day. Use an early start in one city or an evening call in the other.
Time converter
London to Tokyo
United Kingdom
London
12:5832
Wednesday, 29 July 2026BST · UTC+1
Japan
Tokyo
20:5832
Wednesday, 29 July 2026GMT+9 · UTC+9
Working together
The useful part of the difference
A major Europe–Japan business and travel route.
Calendar boundary
Check the date, not just the hour
At 09:00 in London, Tokyo is on the same calendar date.
Daylight saving time
The gap can move during the year
Seasonal clock changes alter the gap: it is 9 hours ahead on the January reference date and 8 hours ahead on the July reference date. Transition weeks can differ again, so check the exact date.