MST to BST
+8hMST
MSTSOURCEBST
BSTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and BST on the World Map
The map below highlights the MST (Mountain Standard Time) and BST (British Summer Time) timezone regions across the globe.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •Arizona does not observe daylight saving time, staying on MST year-round.
- •The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
- •Denver, the 'Mile High City', is the largest city fully in MST.
- •MST covers 6 US states entirely and parts of several others.
BST – British Summer Time
UTC+01:00British Summer Time (BST, UTC+01:00) is the daylight saving period in the United Kingdom, running from late March to late October.
- •BST runs from the last Sunday in March to the last Sunday in October.
- •BST is exactly one hour ahead of GMT, the UK's standard time.
- •During BST, London is 4 hours ahead of New York while the US is on Eastern Daylight Time.
- •The Isle of Man and the Channel Islands also observe BST.
Comparing Time Zones: MST and BST
MST runs on Mountain Standard Time (MST) at UTC-07:00. BST runs on British Summer Time (BST) at UTC+01:00. That puts MST 8 hours ahead of BST — a difference of +8h at the current offsets.
In practice, when it is 9:00 AM in MST it is 5:00 PM in BST. Midnight in MST is 8:00 AM in BST. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to BST time conversion table
| MST (MST) | BST (BST) | Day |
|---|---|---|
| 12:00 AM | 8:00 AM | same day |
| 6:00 AM | 2:00 PM | same day |
| 7:00 AM | 3:00 PM | same day |
| 8:00 AM | 4:00 PM | same day |
| 9:00 AM | 5:00 PM | same day |
| 12:00 PM | 8:00 PM | same day |
| 3:00 PM | 11:00 PM | same day |
| 5:00 PM | 1:00 AM | next day |
| 6:00 PM | 2:00 AM | next day |
| 9:00 PM | 5:00 AM | next day |
Why people convert MST to BST time
- Scheduling a call from MST to BST: a 10:00 AM start in MST lands at 6:00 PM in BST, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +8h gap: MST and BST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in BST is 5:00 PM in MST.
- Coordinating a MST-based team with BST contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.
- Always state the zone abbreviation, not just the hour. "3:00 PM MST" is unambiguous; "3 PM" across a +8h gap is not.
- With a +8h gap there is no shared 9-to-5 window, so alternate the early start: one week MST takes the early slot, the next week BST does.
About MST (Mountain Standard Time)
Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).
About BST (British Summer Time)
British Summer Time (BST) is the daylight saving period in the United Kingdom, when clocks move one hour forward from Greenwich Mean Time (GMT, UTC+00:00) to UTC+01:00. It runs from the last Sunday in March to the last Sunday in October. England, Scotland, Wales and Northern Ireland all follow it, along with the Isle of Man and the Channel Islands of Jersey and Guernsey. During BST, London is one hour ahead of UTC, four hours ahead of New York on Eastern Daylight Time, and five hours ahead of New York once the United States returns to Eastern Standard Time in November. BST is also used to abbreviate Bangladesh Standard Time (UTC+06:00), which is listed separately on this site.
Best time to call between MST and BST
With a +8h offset there is no overlap inside a normal 9 AM – 5 PM day. BST opens at 9:00 AM BST, which is 5:00 PM in MST, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
MST and BST have no shared working hours because of the +8h gap. Teams need to alternate early starts or rely on asynchronous handovers.
MST is 8 hours ahead of BST (MST UTC-07:00 → BST UTC+01:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
BST
☀ Currently in DST
Standard: UTC+00:00 · DST: UTC+01:00
Clocks fall back on Sun, Oct 25, 2026
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between MST and BST?
MST (MST, UTC-07:00) is 8 hours ahead of BST (BST, UTC+01:00). The gap is currently +8h.
How do I convert MST time to BST time?
Add +8h to MST local time. For example, 9:00 AM in MST is 5:00 PM in BST.
What time is it in BST right now?
BST uses BST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +8h offset from MST.
What is the best time to call BST from MST?
There is no shared working-hours window because of the +8h gap. The closest option is 1:00 PM in MST, which is 9:00 PM in BST.
Which is ahead, MST or BST?
MST is 8 hours ahead of BST. When it is 12:00 PM in MST it is 8:00 PM in BST.
Does daylight saving time affect the MST–BST difference?
Neither zone observes daylight saving time, so the +8h offset between MST and BST is fixed all year.
Which other cities share MST's time zone?
MST also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.
Which countries use MST, MST's zone?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Is there a day difference between MST and BST?
Not normally. The +8h gap only pushes the date over for late-evening times.
What is the time difference between MST and BST?
BST is +8h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is BST in?
BST operates on its local timezone.
Which countries use MST (Mountain Standard Time)?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Does MST observe daylight saving time?
Yes, MST switches to MDT during summer months.
What are some interesting facts about MST?
Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
Which cities are in the BST timezone?
Major cities in the BST timezone include London, Birmingham, Manchester, Glasgow, Edinburgh, Cardiff, Belfast, Liverpool.
What is the UTC offset for BST?
British Summer Time (BST) is at UTC+01:00. During daylight saving time, it shifts to BST.
What should I know about the BST timezone?
BST runs from the last Sunday in March to the last Sunday in October. BST is exactly one hour ahead of GMT, the UK's standard time.
When is it midnight in MST, what time is it in BST?
When it is 12:00 AM (midnight) in MST (MST), it is +8h later in BST (BST).
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See every conversion from MST →·See every conversion from BST →