Tokyo to London Time

Tokyo to London conversion chart

Every full hour of Thursday, October 15, 2026 in Tokyo, and the time in London. Pick another date in the converter and the chart follows.

Daylight saving time in Tokyo and London

• Tokyo: Japan Standard Time, JST (UTC+9), with no clock changes: Japan does not use daylight saving time.
• London: UK time, GMT (UTC+0) in winter and BST (UTC+1) in summer. Clocks go forward at 1:00 AM on the last Sunday in March and back at 2:00 AM on the last Sunday in October, the dates the UK government publishes.

Tokyo keeps JST, UTC+9, in every season, so the gap moves only when London switches: March 29 and October 25, 2026, and March 28 and October 31, 2027. Once London switches on March 29, London is 8 hours behind Tokyo, until the October 25 switch puts London back at 9 hours behind.

Tokyo stands still and London moves twice a year, so the gap follows London. With BST in force, London is 8 hours behind Tokyo. With GMT in force, London is 9 hours behind Tokyo. The highlighted rows are the 303 days on GMT:

Tokyo to London hour by hour

Tokyo from 6 AM to 11 PM on the left, London on the right, one column for each of the 2 gaps. Not one of these Tokyo hours falls inside 9 AM to 5 PM in London as well, so nothing is highlighted.

Office hours and the best time to meet

With a 9:00 AM to 5:00 PM workday on both sides, for each gap of the year:

• 8 hours apart (JST with BST), 210 days of 2026: Tokyo and London have no office hour in common. The smallest compromise is 4:30 PM in Tokyo, 8:30 AM in London: an extra 30 minutes in each city. At the other end of the day, 10:30 AM in Tokyo is 2:30 AM in London, which means 6 hours 30 minutes in London outside office hours.
• 9 hours apart (JST with GMT), 155 days of 2026: No hour of the Tokyo workday falls inside the London workday. The smallest compromise is 5:00 PM in Tokyo, 8:00 AM in London: an extra 1 hour in each city. At the other end of the day, 11:00 AM in Tokyo is 2:00 AM in London, which means 7 hours in London outside office hours.

The workweek in Tokyo and London

For a Monday to Friday week with 9-to-5 office hours in both cities:

Monday 9:00 AM in Tokyo is Monday 1:00 AM in London, and Friday 5:00 PM in London is Saturday 1:00 AM in Tokyo. Those are the two edges of the shared workweek. In between, Tokyo and London never have an office hour in common.

From midnight until 8:00 AM in Tokyo, London has not reached the new day yet. That is 8 hours out of every 24.

The quick way: subtract 8 hours to go from Tokyo to London, or 9 hours in the weeks with the other gap. 9:00 AM in Tokyo is 1:00 AM in London.

Tokyo and London against UTC

In 2026, Tokyo is at UTC+9 in both January and July, while London is at UTC+0 in January and UTC+1 in July.

In the IANA time zone database, Tokyo is Asia/Tokyo and London is Europe/London; your browser converts with that data.

Comparing more than two places? Add as many cities as you need in the time zone converter, or find a slot that works for everyone with the meeting planner. For timestamps from logs or APIs, the Unix timestamp converter turns them into readable dates.

Sources

The clock change rules above come from these pages. The dates, the gap table, the hour table and the office hours are computed from them and checked against the time zone data at build time.

• timeanddate.com: time zone and clock changes in Tokyo
• GOV.UK: When do the clocks change?
• IANA: Time Zone Database

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Built by Tobias Kurth, designer. Updated October 14, 2026.

Frequently asked questions