What's the current time difference between London and JST?

Right now, JST (JST · Japan Standard Time) is +8h relative to London (London). The number is live and reflects the current daylight-saving status of both zones.

Does this converter account for daylight saving time?

Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.

Why does the TO column sometimes show "+1d" or "−1d"?

When the London hour lands on a different calendar day in JST, we flag it so you don't accidentally schedule a meeting on the wrong date. London 11 PM is often the next day in eastern-hemisphere zones, for example.

How do I schedule a meeting that works for both zones?

Look at the row highlighted lume green — that's the longest contiguous block where both London and JST are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

London to JST

London ↔ JST · Japan Standard Time. Right now, JST is +8h relative to London. DST is honored live.

From

London

—

JST

—

00:00London hour of day23:30

Live offset

+8h

London (May 23) ↔ JST (May 23)

If London or JST just shifted for daylight saving, that's already reflected.

Best meeting overlap

No 9-to-5 overlap.

Working hours = 9 AM – 5 PM in each zone.

Hour-by-hour

London → JST, every hour

London · May 23JST · May 23

12:00 AM8:00 AM
1:00 AM9:00 AM
2:00 AM10:00 AM
3:00 AM11:00 AM
4:00 AM12:00 PM
5:00 AM1:00 PM
6:00 AM2:00 PM
7:00 AM3:00 PM
8:00 AM4:00 PM
9:00 AM5:00 PM
10:00 AM6:00 PM
11:00 AM7:00 PM
12:00 PM8:00 PM
1:00 PM9:00 PM
2:00 PM10:00 PM
3:00 PM11:00 PM
4:00 PM+1d12:00 AM
5:00 PM+1d1:00 AM
6:00 PM+1d2:00 AM
7:00 PM+1d3:00 AM
8:00 PM+1d4:00 AM
9:00 PM+1d5:00 AM
10:00 PM+1d6:00 AM
11:00 PM+1d7:00 AM

Both zones in working hours±1d = the TO side lands on a different calendar day

FAQ

London ↔ JST, questions answered

What's the current time difference between London and JST?: Right now, JST (JST · Japan Standard Time) is +8h relative to London (London). The number is live and reflects the current daylight-saving status of both zones.
Does this converter account for daylight saving time?: Yes. The math is done against IANA's tz database via Intl.DateTimeFormat, so DST shifts in either zone show up immediately at the transition. Around DST boundaries the conversion can move by an hour from one week to the next — this page always reflects the current rule.
Why does the TO column sometimes show "+1d" or "−1d"?: When the London hour lands on a different calendar day in JST, we flag it so you don't accidentally schedule a meeting on the wrong date. London 11 PM is often the next day in eastern-hemisphere zones, for example.
How do I schedule a meeting that works for both zones?: Look at the row highlighted lume green — that's the longest contiguous block where both London and JST are in standard working hours (9 AM–5 PM local). Open the planner from the link above to lock a specific time and share a DST-stable link with the other party.

Reverse — JST to London Time in London Open in planner