BST to MST Converter
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Quick answers
Selected conversion
4:00 pm16:00 GMT (UTC+0), Nov 1, 2026 = 9:00 am09:00 MST (UTC-7), Nov 1, 2026
GMT is 7 hours ahead of MST.
BST and MST examples
These examples always use BST (UTC+1) and MST (UTC-7). They stay the same when you change the date or time above. The selected conversion may differ when daylight saving time applies.
BST is 8 hours ahead of MST.
Most of Arizona stays on MST (UTC-7) all year. Places such as Denver use MDT (UTC-6) during daylight saving time, one hour later. For daylight-time examples, use BST to MDT.
How the time difference changes
For most of the year, BST is 7 hours ahead of MDT. From Nov 1, 2026 to Mar 14, 2027, GMT is 7 hours ahead of MST. From Mar 14 to Mar 28, 2027, and from Oct 31 to Nov 7, 2027, GMT is 6 hours ahead of MDT.
For most of the year, working hours of 9:00 am to 6:00 pm in BST correspond to 2:00 am to 11:00 am in MDT. At other times of the year, working hours of 9:00 am to 6:00 pm in GMT correspond to 2:00 am to 11:00 am in MST or working hours of 9:00 am to 6:00 pm in GMT correspond to 3:00 am to 12:00 pm in MDT.For most of the year, working hours of 09:00 to 18:00 in BST correspond to 02:00 to 11:00 in MDT. At other times of the year, working hours of 09:00 to 18:00 in GMT correspond to 02:00 to 11:00 in MST or working hours of 09:00 to 18:00 in GMT correspond to 03:00 to 12:00 in MDT.
Compare BST time with MST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Greenwich Mean Time is 7 hours ahead of Mountain Standard Time.
4:00 pm16:00 in GMT is 9:00 am09:00 in MST
GMT to MST call time
Best time for a conference call or a meeting is between 4pm-6pm16:00-18:00 in GMT which corresponds to 9am-11am09:00-11:00 in MST
4:00 pm16:00 Greenwich Mean Time (GMT). Offset UTC 0:00 hours
9:00 am09:00 Mountain Standard Time (MST). Offset UTC -7:00 hours
4:00 pm16:00 GMT / 9:00 am09:00 MST
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.
| GMT | MST |
|---|---|
| 6:00pm previous day MDT UTC-6 | |
| 7:00pm previous day MDT UTC-6 | |
| 8:00pm previous day MDT UTC-6 | |
| 9:00pm previous day MDT UTC-6 | |
| 10:00pm previous day MDT UTC-6 | |
| 11:00pm previous day MDT UTC-6 | |
| 12:00am MDT UTC-6 | |
| 1:00am MDT UTC-6 | |
| 1:00am | |
| 2:00am | |
| 3:00am | |
| 4:00am | |
| 5:00am | |
| 6:00am | |
| 7:00am | |
| 8:00am | |
| 9:00am | |
| 10:00am | |
| 11:00am | |
| 12:00pm | |
| 1:00pm | |
| 2:00pm | |
| 3:00pm | |
| 4:00pm | |
| 18:00 previous day MDT UTC-6 | |
| 19:00 previous day MDT UTC-6 | |
| 20:00 previous day MDT UTC-6 | |
| 21:00 previous day MDT UTC-6 | |
| 22:00 previous day MDT UTC-6 | |
| 23:00 previous day MDT UTC-6 | |
| 00:00 MDT UTC-6 | |
| 01:00 MDT UTC-6 | |
| 01:00 | |
| 02:00 | |
| 03:00 | |
| 04:00 | |
| 05:00 | |
| 06:00 | |
| 07:00 | |
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| 11:00 | |
| 12:00 | |
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| 16:00 |
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.
Greenwich Mean Time (GMT) originally referred to the mean solar time at the Royal Observatory in Greenwich, London. It is now often used to refer to Coordinated Universal Time (UTC) when this is viewed as a time zone, and in casual use the two are the same. In the military, GMT is known as Zulu time. Greenwich Mean Time was the same as Universal Time (UT), a standard astronomical concept used in many technical fields, until the introduction of UTC in 1972.
Current time in the United Kingdom: UK time now
Today the shaded areas are on UTC+0 (GMT).
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
Mountain Standard Time
Offset: MST is 7 hours behind Greenwich Mean Time (GMT).
Countries using this time zone: Canada, Mexico, United States
Principal Cities: The largest city in the MST time zone is Phoenix in the United States, with about 1.65 million people. Other major cities in this time zone include Ciudad Juárez, Hermosillo, Culiacán, Denver.
French: HNR - Heure Normale des Rocheuses
Spanish: MT - Zona Pacífico
Today all shaded areas are on MST.
Daylight Saving: This is a standard time zone. During summer, some places set clocks forward one hour for daylight saving time and observe Mountain Daylight Time (MDT).
Start: Mountain Standard Time (MST) started on Sunday, November 1, 2026 at 2:00 am02:00 local time and clocks were set one hour back to Sunday, November 1, 2026, 1:00 am01:00. Standard time starts annually on the first Sunday of November.
End: Mountain Standard Time (MST) ends on Sunday, March 14, 2027 at 2:00 am02:00 local time and clocks are set one hour forward to Sunday, March 14, 2027, 3:00 am03:00 local daylight time instead. Standard time ends annually on the second Sunday of March.
See USA daylight saving time and upcoming clock changes worldwide.
MST representations, usage and related time zones
- -07 - basic short
- -0700 - basic
- -07:00 - extended
- -0700 - sign character (-) followed by a four digit time providing hours (07) and minutes (00) of the offset. Indicates an offset of seven hours to the west of the zero meridian.
- Tango - Military abbreviation for MST
- T - short form of 'Tango'
- America/Boise
- America/Cambridge_Bay
- America/Ciudad_Juarez
- America/Creston
- America/Dawson
- America/Dawson_Creek
- America/Denver
- America/Edmonton
- America/Fort_Nelson
- America/Hermosillo
- America/Inuvik
- America/Mazatlan
- America/Phoenix
- America/Shiprock
- America/Whitehorse
- America/Yellowknife
- Canada/Mountain
- Canada/Yukon
- MST
- MST7MDT
- Mexico/BajaSur
- Navajo
- US/Arizona
- US/Mountain
- MST - Mountain Standard Time
- PDT - Pacific Daylight Time
- YST - Yukon Standard Time
- T - Tango Time Zone