Tokyo to IST to BST Time Converter
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Quick answers
Selected conversion
9:00 pm21:00 JST (UTC+9), Oct 18, 2026 = 5:30 pm17:30 IST (UTC+5:30), Oct 18, 2026 = 1:00 pm13:00 BST (UTC+1), Oct 18, 2026
Tokyo is 3 hours and 30 minutes ahead of IST. Tokyo is 8 hours ahead of BST.
How the time difference changes
Tokyo to IST
Tokyo is 3 hours and 30 minutes ahead of IST year-round.
Working hours of 9:00 am to 6:00 pm in Tokyo correspond to 5:30 am to 2:30 pm in IST.Working hours of 09:00 to 18:00 in Tokyo correspond to 05:30 to 14:30 in IST.
Tokyo to BST
For most of the year, Tokyo is 8 hours ahead of BST. From Oct 25, 2026 to Mar 28, 2027, Tokyo is 9 hours ahead of GMT.
For most of the year, working hours of 9:00 am to 6:00 pm in Tokyo correspond to 1:00 am to 10:00 am in BST. At other times of the year, working hours of 9:00 am to 6:00 pm in Tokyo correspond to 12:00 am to 9:00 am in GMT.For most of the year, working hours of 09:00 to 18:00 in Tokyo correspond to 01:00 to 10:00 in BST. At other times of the year, working hours of 09:00 to 18:00 in Tokyo correspond to 00:00 to 09:00 in GMT.
Compare Tokyo time with IST and BST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
JST (Japan Standard Time) is 3 hours and 30 minutes ahead of India Standard Time. JST (Japan Standard Time) is 8 hours ahead of British Summer Time.
9:00 pm21:00 in Tokyo, Japan is 5:30 pm17:30 in IST and is 1:00 pm13:00 in BST
Tokyo to IST call time
Best time for a conference call or a meeting is between 12:30pm-6pm12:30-18:00 in Tokyo which corresponds to 9am-2:30pm09:00-14:30 in IST
Tokyo to BST call time
Best time for a conference call or a meeting is between 5pm-6pm17:00-18:00 in Tokyo which corresponds to 9am-10am09:00-10:00 in BST
9:00 pm21:00 JST (Japan Standard Time) (Tokyo, Japan). Offset UTC +9:00 hours
5:30 pm17:30 India Standard Time (IST). Offset UTC +5:30 hours
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
9:00 pm21:00 Tokyo, Japan / 5:30 pm17:30 IST / 1:00 pm13:00 BST
Choose an hour to update the converter. Day labels such as “next day” or “+1” are relative to the selected date in the first column. Use Up and Down arrow keys, Home or End to move between hours, then Enter or Space to select.
| Tokyo, Japan | IST | BST |
|---|---|---|
| 8:30pm previous day | 4:00pm previous day | |
| 9:30pm previous day | 5:00pm previous day | |
| 10:30pm previous day | 6:00pm previous day | |
| 11:30pm previous day | 7:00pm previous day | |
| 12:30am | 8:00pm previous day | |
| 1:30am | 9:00pm previous day | |
| 2:30am | 10:00pm previous day | |
| 3:30am | 11:00pm previous day | |
| 4:30am | 12:00am | |
| 5:30am | 1:00am | |
| 6:30am | 2:00am | |
| 7:30am | 3:00am | |
| 8:30am | 4:00am | |
| 9:30am | 5:00am | |
| 10:30am | 6:00am | |
| 11:30am | 7:00am | |
| 12:30pm | 8:00am | |
| 1:30pm | 9:00am | |
| 2:30pm | 10:00am | |
| 3:30pm | 11:00am | |
| 4:30pm | 12:00pm | |
| 5:30pm | 1:00pm | |
| 6:30pm | 2:00pm | |
| 7:30pm | 3:00pm | |
| 20:30 previous day | 16:00 previous day | |
| 21:30 previous day | 17:00 previous day | |
| 22:30 previous day | 18:00 previous day | |
| 23:30 previous day | 19:00 previous day | |
| 00:30 | 20:00 previous day | |
| 01:30 | 21:00 previous day | |
| 02:30 | 22:00 previous day | |
| 03:30 | 23:00 previous day | |
| 04:30 | 00:00 | |
| 05:30 | 01:00 | |
| 06:30 | 02:00 | |
| 07:30 | 03:00 | |
| 08:30 | 04:00 | |
| 09:30 | 05:00 | |
| 10:30 | 06:00 | |
| 11:30 | 07:00 | |
| 12:30 | 08:00 | |
| 13:30 | 09:00 | |
| 14:30 | 10:00 | |
| 15:30 | 11:00 | |
| 16:30 | 12:00 | |
| 17:30 | 13:00 | |
| 18:30 | 14:00 | |
| 19:30 | 15:00 |
Tokyo Time Zone and Facts
Time Zone
Tokyo Facts
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
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