BST to IST to Tokyo Time Converter
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Quick answers
Selected conversion
1:00 pm13:00 BST (UTC+1), Oct 18, 2026 = 5:30 pm17:30 IST (UTC+5:30), Oct 18, 2026 = 9:00 pm21:00 JST (UTC+9), Oct 18, 2026
BST is 4 hours and 30 minutes behind IST. BST is 8 hours behind Tokyo.
How the time difference changes
BST to IST
For most of the year, BST is 4 hours and 30 minutes behind IST. From Oct 25, 2026 to Mar 28, 2027, GMT is 5 hours and 30 minutes behind IST.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 1:30 pm to 10:30 pm in IST. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 2:30 pm to 11:30 pm in IST.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 13:30 to 22:30 in IST. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 14:30 to 23:30 in IST.
BST to Tokyo
For most of the year, BST is 8 hours behind Tokyo. From Oct 25, 2026 to Mar 28, 2027, GMT is 9 hours behind Tokyo.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 5:00 pm to 2:00 am (next day) in Tokyo. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 6:00 pm to 3:00 am (next day) in Tokyo.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 17:00 to 02:00 (next day) in Tokyo. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 18:00 to 03:00 (next day) in Tokyo.
Compare BST time with IST and Tokyo time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
British Summer Time is 4 hours and 30 minutes behind India Standard Time. British Summer Time is 8 hours behind JST (Japan Standard Time).
1:00 pm13:00 in BST is 5:30 pm17:30 in IST and is 9:00 pm21:00 in Tokyo, Japan
BST to IST call time
Best time for a conference call or a meeting is between 9am-1:30pm09:00-13:30 in BST which corresponds to 1:30pm-6pm13:30-18:00 in IST
BST to Tokyo call time
Best time for a conference call or a meeting is between 9am-10am09:00-10:00 in BST which corresponds to 5pm-6pm17:00-18:00 in Tokyo
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
9:00 pm21:00 JST (Japan Standard Time) (Tokyo, Japan). Offset UTC +9:00 hours
1:00 pm13:00 BST / 5:30 pm17:30 IST / 9:00 pm21:00 Tokyo, Japan
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| BST | IST | Tokyo, Japan |
|---|---|---|
| 4:30am | 8:00am | |
| 5:30am | 9:00am | |
| 6:30am | 10:00am | |
| 7:30am | 11:00am | |
| 8:30am | 12:00pm | |
| 9:30am | 1:00pm | |
| 10:30am | 2:00pm | |
| 11:30am | 3:00pm | |
| 12:30pm | 4:00pm | |
| 1:30pm | 5:00pm | |
| 2:30pm | 6:00pm | |
| 3:30pm | 7:00pm | |
| 4:30pm | 8:00pm | |
| 5:30pm | 9:00pm | |
| 6:30pm | 10:00pm | |
| 7:30pm | 11:00pm | |
| 8:30pm | 12:00am next day | |
| 9:30pm | 1:00am next day | |
| 10:30pm | 2:00am next day | |
| 11:30pm | 3:00am next day | |
| 12:30am next day | 4:00am next day | |
| 1:30am next day | 5:00am next day | |
| 2:30am next day | 6:00am next day | |
| 3:30am next day | 7:00am next day | |
| 04:30 | 08:00 | |
| 05:30 | 09:00 | |
| 06:30 | 10:00 | |
| 07:30 | 11:00 | |
| 08:30 | 12:00 | |
| 09:30 | 13:00 | |
| 10:30 | 14:00 | |
| 11:30 | 15:00 | |
| 12:30 | 16:00 | |
| 13:30 | 17:00 | |
| 14:30 | 18:00 | |
| 15:30 | 19:00 | |
| 16:30 | 20:00 | |
| 17:30 | 21:00 | |
| 18:30 | 22:00 | |
| 19:30 | 23:00 | |
| 20:30 | 00:00 next day | |
| 21:30 | 01:00 next day | |
| 22:30 | 02:00 next day | |
| 23:30 | 03:00 next day | |
| 00:30 next day | 04:00 next day | |
| 01:30 next day | 05:00 next day | |
| 02:30 next day | 06:00 next day | |
| 03:30 next day | 07:00 next day |
British Summer Time
Offset: BST is 1 hour ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Guernsey, Isle of Man, Jersey, United Kingdom
Principal Cities: The largest city in the BST time zone is London in the United Kingdom, with about 8.962 million people. Other major cities in this time zone include Birmingham, Glasgow, Manchester, Sheffield.
Current time in the United Kingdom: UK time now
Today all shaded areas are on BST.
Daylight Saving: British Summer Time (BST) is a daylight saving/summer time zone. During winter, some places set clocks back one hour and observe Greenwich Mean Time (GMT).
Start: British Summer Time (BST) started on Sunday, March 29, 2026 at 1:00 am01:00 local time and clocks were set one hour forward to Sunday, March 29, 2026, 2:00 am02:00. Daylight saving starts annually on the last Sunday of March.
End: British Summer Time (BST) ends on Sunday, October 25, 2026 at 2:00 am02:00 local time and clocks are set one hour back to Sunday, October 25, 2026, 1:00 am01:00 local standard time instead. Daylight saving ends annually on the last Sunday of October.
See United Kingdom daylight saving time and upcoming clock changes worldwide.
BST representations, usage and related time zones
- +01 - basic short
- +0100 - basic
- +01:00 - extended
- +0100 - sign character (+) followed by a four digit time providing hours (01) and minutes (00) of the offset. Indicates an offset of one hour to the east of the zero meridian.
- Alpha - Military abbreviation for BST
- A - short form of 'Alpha'
- Europe/Belfast
- Europe/Guernsey
- Europe/Isle_of_Man
- Europe/Jersey
- Europe/London
- GB
- GB-Eire
- British Summer Time - UTC +1
- Bangladesh Standard Time - UTC +6
- Bougainville Standard Time - UTC +11
- BST - British Summer Time
- CET - Central European Time
- IST - Irish Standard Time
- WEST - Western European Summer Time
- A - Alpha Time Zone
- CET - Central European Time
- MEZ - Mitteleuropäische Zeit
- WAT - West Africa Time
- WST - Western Sahara Summer Time
- BMT - Biel Mean Time
India Standard Time
Offset: IST is 5 hours and 30 minutes ahead of Greenwich Mean Time (GMT).
Countries using this time zone: India
Principal Cities: The largest city in the IST time zone is Mumbai in India, with about 12.692 million people. Other major cities in this time zone include Delhi, Bengaluru, Hyderabad, Ahmedabad.
Daylight Saving: Clocks in India Standard Time (IST) do not change for daylight saving time, so IST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
Current time in India: India time now
IST representations, usage and related time zones
- +0530 - basic
- +05:30 - extended
- +0530 - sign character (+) followed by a four digit time providing hours (05) and minutes (30) of the offset. Indicates an offset of five hours and thirty minutes to the east of the zero meridian.
- Asia/Calcutta
- Asia/Kolkata
- India Standard Time - UTC +5:30
- Irish Standard Time - UTC +1
- Israel Standard Time - UTC +2