GMT → JST Converter
London to Tokyo — financial pair: LSE and TSE coordinate on Asian equity coverage and cross-listed securities. The 9-hour gap (8 when UK observes BST) means virtually no business-hour overlap.
GMT → JST
7:40 PM
British Summer Time (GMT+1)
Thursday, June 11, 2026
UTC+1 (DST active)
3:40 AM
Japan Standard Time (GMT+9)
Friday, June 12, 2026
UTC+9 (DST active)
Time Zone Converter
GMT·London
7:40 PM
Thursday, June 11, 2026
JST·Tokyo
3:40 AM
Friday, June 12, 2026
Compare Times
| GMT | JST |
|---|
Morning
| GMT | JST |
|---|---|
| 12:00 AM GMT | 9:00 AM JST |
| 1:00 AM GMT | 10:00 AM JST |
| 2:00 AM GMT | 11:00 AM JST |
| 3:00 AM GMT | 12:00 PM JST |
| 4:00 AM GMT | 1:00 PM JST |
| 5:00 AM GMT | 2:00 PM JST |
| 6:00 AM GMT | 3:00 PM JST |
| 7:00 AM GMT | 4:00 PM JST |
| 8:00 AM GMT | 5:00 PM JST |
| 9:00 AM GMT | 6:00 PM JST |
| 10:00 AM GMT | 7:00 PM JST |
| 11:00 AM GMT | 8:00 PM JST |
Afternoon
| GMT | JST |
|---|---|
| 12:00 PM GMT | 9:00 PM JST |
| 1:00 PM GMT | 10:00 PM JST |
| 2:00 PM GMT | 11:00 PM JST |
| 3:00 PM GMT | 12:00 AM JST |
| 4:00 PM GMT | 1:00 AM JST |
Evening
| GMT | JST |
|---|---|
| 5:00 PM GMT | 2:00 AM JST |
| 6:00 PM GMT | 3:00 AM JST |
| 7:00 PM GMT | 4:00 AM JST |
| 8:00 PM GMT | 5:00 AM JST |
| 9:00 PM GMT | 6:00 AM JST |
| 10:00 PM GMT | 7:00 AM JST |
| 11:00 PM GMT | 8:00 AM JST |
Frequently Asked Questions: GMT to JST
What is the time difference between UK Time and Japan Standard Time?
JST is 9 hours ahead of GMT (standard time).
What time is midnight in GMT in JST?
Midnight (12:00 AM) in UK Time translates to 9:00 AM JST in Japan Standard Time.
When do business hours overlap between GMT and JST?
Standard 9–5 business hours do not overlap between UK Time and Japan Standard Time. The closest scheduling window is 08:00–09:00 GMT (17:00–18:00 JST).
Common Time Conversions
EST · New York →
CST · Chicago →
MST · Denver →
PST · Los Angeles →
AKST · Anchorage →
HST · Honolulu →
UTC · Universal →
GMT · London →
IST · New Delhi →
CET · Paris →
How Time Zone Conversion Works
Time zone conversion works by comparing the UTC offset of one location to another. Every city or region is measured relative to Coordinated Universal Time (UTC), which acts as the global reference point for civil time.
JST is 9 hours ahead of GMT (standard time).
Daylight Saving Time: GMT observes DST; JST does not. The offset between them shifts by 1 hour twice a year — in spring and autumn — when GMT changes its clocks.
Best time to call Tokyo from London
Planning a remote meeting or international call? The optimal business hours overlap between London and Tokyo is challenging, with few shared business hours between the two zones.
Try Meeting Planner for multi-city group scheduling →GMT
08:00–09:00
Greenwich Time
JST
17:00–18:00
Japan Time
Recommended time: 08:00 GMT / 17:00 JST
DST schedule for 2026
Current-year daylight saving start and end dates for the selected zones.
GMT · Greenwich Time
Standard offset +00:00
- Starts
- Mar 29, 2026 · 01:00 → 02:00
- last_sunday_of_march
- Ends
- Oct 25, 2026 · 02:00 → 01:00
- last_sunday_of_october
- Daylight time
- BST · +01:00
GMT countries vary. The UK, Ireland, and Portugal observe summer time; Iceland and most of West Africa remain on GMT year-round.
JST · Japan Time
Standard offset +09:00
Japan Time remains on a constant standard offset for the year.
Japan has not observed daylight saving time since 1951.
Principal Cities
GMT — Greenwich Time
- LondonUnited Kingdom
- DublinIreland
- LisbonPortugal
- CasablancaMorocco
JST — Japan Time
- TokyoJapan
- YokohamaJapan
- OsakaJapan
- NagoyaJapan
Flight Information
Route
LHR ↔ NRT
Avg. flight time
11h
Direct flights
Available
~11h direct flight.