MST to BST Time Converter
British Summer Time (BST) is currently 8 hours ahead of Mountain Standard Time (MST). MST is UTC-7 and BST is UTC+1. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 9:00 AM in MST, which is 5:00 PM to 5:00 PM in BST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: MST to BST
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
MST and BST are fixed offsets, so the difference between them never changes.
MST is UTC-7. Most of the Mountain region switches to MDT (UTC-6) in summer, but Arizona stays on MST year round.
BST is UTC+1, used in the UK from late March to late October. In winter the UK is on GMT. BST can also refer to Bangladesh Standard Time, which is UTC+6.
Frequently Asked Questions
How many hours ahead is BST compared to MST?
BST is currently 8 hours ahead of MST. MST and BST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in MST in BST?
9:00 AM in MST is 5:00 PM in BST.
What is the best time for a call between MST and BST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 9:00 AM in MST, which is 5:00 PM to 5:00 PM in BST.