BST to MART Converter
No shared working hoursFri, Oct 16
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Quick answers
Selected conversion
1:00 pm13:00 BST (UTC+1), Oct 16, 2026 = 2:30 am02:30 MART (UTC-9:30), Oct 16, 2026
BST is 10 hours and 30 minutes ahead of MART.
BST and MART examples
These examples always use BST (UTC+1) and MART (UTC-9:30). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BST is 10 hours and 30 minutes ahead of MART.
How the time difference changes
For most of the year, BST is 10 hours and 30 minutes ahead of MART. From Oct 25, 2026 to Mar 28, 2027, GMT is 9 hours and 30 minutes ahead of MART.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 10:30 pm (previous day) to 7:30 am in MART. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 11:30 pm (previous day) to 8:30 am in MART.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 22:30 (previous day) to 07:30 in MART. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 23:30 (previous day) to 08:30 in MART.
Compare BST time with MART time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
British Summer Time is 10 hours and 30 minutes ahead of Marquesas Time.
1:00 pm13:00 in BST is 2:30 am02:30 in MART
BST to MART call time
Best time for a conference call or a meeting is between 6:30pm-7:30pm18:30-19:30 in BST which corresponds to 8am-9am08:00-09:00 in MART. Their 9am–6pm09:00–18:00 working hours do not overlap; this is a suggested compromise.
1:00 pm13:00 British Summer Time (BST). Offset UTC +1:00 hour
2:30 am02:30 Marquesas Time (MART). Offset UTC -9:30 hours
1:00 pm13:00 BST / 2:30 am02:30 MART
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.
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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.
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
Marquesas Time
Offset: MART is 9 hours and 30 minutes behind Greenwich Mean Time (GMT).
Countries using this time zone: French Polynesia
Principal Cities: The largest city in the MART time zone is Atuona in French Polynesia, with about 1,762 people. Other major cities in this time zone include Taiohae.
Daylight Saving: Clocks in Marquesas Time (MART) do not change for daylight saving time, so MART stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter; see upcoming clock changes worldwide.
MART representations, usage and related time zones
- -0930 - basic
- -09:30 - extended
- -0930 - sign character (-) followed by a four digit time providing hours (09) and minutes (30) of the offset. Indicates an offset of nine hours and thirty minutes to the west of the zero meridian.