JST to GMT converter: Japan time to UK time

In 2026 London is 9 hours behind Tokyo until 29 March, 8 hours behind from 29 March to 25 October and 9 hours behind for the rest of the year, as only London changes its clocks.

Tokyo12:00 PMSunday 11 Oct · JST

London4:00 AMSunday 11 Oct · BST

London is 8 h behind Tokyo today.

Tokyo

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London

16171819202122230123456789101112131415

9 to 6 working hoursboth at workOverlap: 5 PM–6 PM in Tokyo

Your result

Enter your values to see the result.

Daylight saving: local time and fixed JST and GMT

The converter starts with Tokyo to London, using local clock rules. For the standard-time offsets all year, use the fixed JST and GMT button.

These examples use noon on the dates shown. A converted date can be the previous or following day.

Starting date and time	Using local city rules	Using fixed JST and GMT
2026-01-15 12:00	2026-01-15 03:00 (UTC+00:00)	2026-01-15 03:00
2026-07-15 12:00	2026-07-15 04:00 (UTC+01:00)	2026-07-15 03:00

12:00 PM Wednesday 15 Jul in Tokyo is 4:00 AM Wednesday 15 Jul in London (BST, 8 h behind).

Why daylight saving conversions need a date explains skipped and repeated clock readings. The rules here come from the browser’s time zone data and can lag a government change.