BST to M 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 = 12:00 am00:00 M (UTC+12), Oct 17, 2026
BST is 11 hours behind M.
BST and M examples
These examples always use BST (UTC+1) and M (UTC+12). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BST is 11 hours behind M.
How the time difference changes
For most of the year, BST is 11 hours behind M. From Oct 25, 2026 to Mar 28, 2027, GMT is 12 hours behind M.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 8:00 pm to 5:00 am (next day) in M. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 9:00 pm to 6:00 am (next day) in M.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 20:00 to 05:00 (next day) in M. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 21:00 to 06:00 (next day) in M.
Compare BST time with M time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
British Summer Time is 11 hours behind Mike Time Zone.
1:00 pm13:00 in BST is 12:00 am00:00 in M
BST to M call time
Best time for a conference call or a meeting is between 7:30am-8:30am07:30-08:30 in BST which corresponds to 6:30pm-7:30pm18:30-19:30 in M. 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
12:00 am00:00 Mike Time Zone (M). Offset UTC +12:00 hours
1:00 pm13:00 BST / 12:00 am00:00 M
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.
| BST | M |
|---|---|
| 11:00am | |
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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
Mike Time Zone
Offset: M is 12 hours ahead of Greenwich Mean Time (GMT).
Countries using this time zone: Antarctica, Fiji, Kiribati, Marshall Islands, Nauru, New Zealand, Norfolk Island, Russia, Tuvalu, United States Minor Outlying Islands, Wallis and Futuna
Principal Cities: The largest city in the M time zone is Auckland in New Zealand, with about 1.547 million people. Other major cities in this time zone include Christchurch, Wellington, Hamilton, Petropavlovsk-Kamchatsky.
Daylight Saving: Some places on Mike Time Zone (M) keep the same time all year, while others use M for only part of the year and change their clocks for daylight saving time; see upcoming clock changes worldwide.
Today some of the lighter areas are on UTC+13 (NZDT).
M representations, usage and related time zones
- +12 - basic short
- +1200 - basic
- +12:00 - extended
- +1200 - sign character (+) followed by a four digit time providing hours (12) and minutes (00) of the offset. Indicates an offset of twelve hours to the east of the zero meridian.
- Mike - Military abbreviation for M
- M - short form of 'Mike'
- ANAST - Anadyr Summer Time
- ANAT - Anadyr Time
- FJT - Fiji Time
- GILT - Gilbert Island Time
- M - Mike Time Zone
- MAGST - Magadan Summer Time
- MHT - Marshall Islands Time
- NRT - Nauru Time
- NZST - New Zealand Standard Time
- PETT - Kamchatka Time
- PETST - Kamchatka Summer Time
- TVT - Tuvalu Time
- WFT - Wallis and Futuna Time