Convert MST to BST
See the live 8-hour time difference, compare hours side by side, and schedule meetings between Mountain Standard Time and British Summer Time.
How Conversion Works
Convert Mountain Standard Time (UTC-7) to British Summer Time (UTC+1) with the current 8-hour difference applied automatically. Results update for daylight saving changes when regions switch schedules.
Hour-by-Hour Time Table
Use the visual grid to compare MST and BST hour by hour across the day. Check overlapping business hours, scan date changes, and export selected times to ICS or Google Calendar.
Schedule Meetings Accurately
Find the best meeting times between MST and BST and share them by calendar invite, Gmail, or downloadable ICS file. Time calculations adjust automatically using the IANA timezone database and historical DST rules.
How to Convert MST to BST
Open the MST to BST converter: Go to https://www.xconvert.com/time-converter/mst-to-bst-converter. The page opens with Mountain Standard Time and BST already loaded in the comparison grid, which is useful if you are scheduling a call between a team in the U.S. Mountain Time zone and contacts in the United Kingdom, such as a client, supplier, or support desk.
Add comparison cities if your workflow spans more locations: Click + Add City and search for cities that matter to your schedule, such as Denver or Phoenix for MST-side planning and London for BST-side coordination. This is especially helpful for industries like software, customer support, logistics, and consulting, where one meeting may need to work for North American operations and UK-based decision-makers at the same time.
Drag across the grid to compare a real meeting window: Click Select to enter selection mode, then drag across the MST row to highlight a time block in purple. For example, if you drag from 9:00 MST to 12:00 MST, the BST row shows 22:00 BST to 1:00 BST, making it immediately clear that a late-morning meeting in MST lands late at night in BST and may not suit a standard UK workday.
Export the selected time for your team: After selecting a range, use the export options for ICS download, Google Calendar, Gmail, Copy to clipboard, or Share link. This is practical when you need to send a confirmed cross-border meeting slot to a distributed team so each person sees the event in local time without manually converting MST to BST.
Understanding the MST to BST Time Difference
Mountain Standard Time is UTC-7, and BST is UTC+6, so BST is 13 hours ahead of MST. In practical terms, that means the BST date is often already the next calendar day when it is still the same morning or afternoon in MST.
The conversion examples show how quickly the date shift appears. 9:00 MST = 22:00 BST, 12:00 MST = 1:00 BST (next day), 15:00 MST = 4:00 BST (next day), and 18:00 MST = 7:00 BST (next day). These examples are useful for planning handoffs, overnight support coverage, or international email deadlines, because even a midday MST task can land after midnight in BST.
Daylight saving time can change how people describe these zones, because MST is a standard-time abbreviation and its DST counterpart is MDT, while BST is a standard-time abbreviation and its DST counterpart is GMT. During parts of the year when one or both locations are observing their DST counterpart instead of the listed standard abbreviation, the difference can change, so it is important to confirm whether the schedule is specifically in MST to BST or in a seasonal counterpart pairing before sending invites.
MST is used in Canada, Mexico, and the United States, while BST is used in Guernsey, Isle of Man, Jersey, and the United Kingdom. That makes this conversion relevant for cross-border work in sectors such as technology, outsourcing, manufacturing, travel operations, and financial administration, where teams may need to coordinate between North American daytime hours and UK-based next-day availability.
Best Times for Calls and Meetings Between MST and BST
Because BST is 13 hours ahead of MST, the overlap for same-day business hours is limited. The examples make this clear: 9:00 MST = 22:00 BST, which is already late evening in BST, and 12:00 MST = 1:00 BST (next day), which moves into the early hours of the following day.
For most standard office schedules, the most realistic meeting options happen at the very start of the MST workday, before BST gets too late. Once you move past the morning in MST, the UK side is already in late evening or after midnight, so meetings become more suitable for urgent escalations, global operations teams, or shift-based support rather than normal business calls.
The sample conversions also help identify what usually does not work. 15:00 MST = 4:00 BST (next day) and 18:00 MST = 7:00 BST (next day), so afternoon and early evening meetings in MST are generally too late for a normal BST work schedule. If you are arranging recurring calls between North America and the UK, the tool’s visual grid is especially useful for spotting whether an MST morning slot is acceptable before you send a calendar invite.
This pattern matters for real-world coordination. A product team in the U.S. Mountain region may need to brief a UK agency, legal team, or operations partner before the BST side signs off for the day, while a UK stakeholder may prefer to send updates that the MST team can review at the start of their morning. Using the grid to compare a narrow morning MST window is often the simplest way to find a workable compromise.
Frequently Asked Questions
What is the time difference between MST and BST?
The time difference is 13 hours, with BST 13 hours ahead of MST. That means when the workday starts in MST, it is already much later in BST, and by midday in MST the BST side has usually moved into the next calendar day.
When is 9 AM MST in BST?
9:00 MST = 22:00 BST. This is a useful reference point for scheduling because a morning meeting in Mountain Standard Time lands late in the evening for BST participants, which may be acceptable for occasional calls but not ideal for daily recurring meetings.
When is 12 PM MST in BST?
12:00 MST = 1:00 BST (next day). The next-day shift is important for deadlines, handoffs, and customer communication, because a noon update sent from an MST office reaches BST after midnight.
Does the difference between MST and BST change during DST?
Yes, it can change when locations are using their daylight saving counterparts instead of these standard abbreviations. MST pairs with MDT during DST, and BST pairs with GMT, so you should confirm whether your meeting is being scheduled specifically in MST and BST or in seasonal alternatives before locking in a recurring event.
What is the best meeting time between MST and BST?
The best meeting times are usually at the start of the MST workday, because BST is already far ahead. The examples show why: 9:00 MST = 22:00 BST, while 12:00 MST = 1:00 BST (next day), so even late morning in MST can already be too late for a normal BST business call.
Why does BST fall on the next day when it is afternoon in MST?
Because BST is 13 hours ahead of MST, the calendar rolls over sooner on the BST side. This is why 12:00 MST = 1:00 BST (next day), 15:00 MST = 4:00 BST (next day), and 18:00 MST = 7:00 BST (next day), making date awareness essential when booking travel, support coverage, or project deadlines.
Which countries use MST and BST?
MST is used in Canada, Mexico, and the United States. BST is used in Guernsey, Isle of Man, Jersey, and the United Kingdom, so this conversion often matters for North America-to-UK business communication, vendor coordination, and remote team scheduling.
Is MST the same as MDT, and is BST the same as GMT?
No. MST is the standard-time abbreviation, while MDT is its daylight saving counterpart. BST is also listed as a standard-time abbreviation here, and its DST counterpart is GMT, so the exact label used in a meeting invite matters when people are scheduling across seasons.