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Convert Greenwich Mean Time to Japan Time

GMT · UTC+1 → JST · UTC+9

GMT is 8 hours behind JST

London · BST

Tuesday, 8 September 2026

Tokyo · UTC+9

Tuesday, 8 September 2026

When are both sides at work?

0003060912151821
LondonBST · +01:00
0003060912151821
TokyoUTC+9 · +09:00
0811141720230205

Shared working hours: 09:00–10:00 in London is 17:00–18:00 in Tokyo.

Working (09–18) Awake, off the clock Asleep (23–07)

Pick a time and share it

08:05 Tue 8 Sep London = 16:05 Tue 8 Sep Tokyo

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Hour-by-hour conversion

London (GMT)Tokyo (JST)
00:0008:00
01:0009:00
02:0010:00
03:0011:00
04:0012:00
05:0013:00
06:0014:00
07:0015:00
08:0016:00Now
09:0017:00Both at work
10:0018:00
11:0019:00
12:0020:00
13:0021:00
14:0022:00
15:0023:00
16:0000:00next day
17:0001:00next day
18:0002:00next day
19:0003:00next day
20:0004:00next day
21:0005:00next day
22:0006:00next day
23:0007:00next day

About this conversion

GMT here means Greenwich Mean Time, represented by London (Europe/London), currently UTC+1. JST means Japan Time, represented by Tokyo (Asia/Tokyo), currently UTC+9.

GMT is used by 22 zones, including United Kingdom. If you meant a different one, see every meaning of GMT.

Working hours are shown as 09:00–18:00 local, and sleeping hours as 23:00–07:00. The hour table is anchored on the current day in London; day boundaries are marked where the date differs.

Quick answers

  • 09:00 GMT is 17:00 JST
  • 12:00 GMT is 20:00 JST
  • 15:00 GMT is 23:00 JST
  • 18:00 GMT is 02:00 JST

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