GMT to MDT Time Converter
Mountain Daylight Time (MDT) is currently 6 hours behind Greenwich Mean Time (GMT). GMT is UTC+0 and MDT is UTC-6. 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 3:00 PM and 5:00 PM in GMT, which is 9:00 AM to 11:00 AM in MDT.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: GMT to MDT
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?
GMT and MDT are fixed offsets, so the difference between them never changes.
GMT is UTC+0 and never shifts. The UK is on GMT in winter but moves to BST (UTC+1) from late March to late October.
MDT is UTC-6, the summer counterpart of MST, used from March to November.
Frequently Asked Questions
How many hours behind is MDT compared to GMT?
MDT is currently 6 hours behind GMT. GMT and MDT are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in GMT in MDT?
9:00 AM in GMT is 3:00 AM in MDT.
What is the best time for a call between GMT and MDT?
Both sides are inside 9:00 AM to 5:00 PM office hours between 3:00 PM and 5:00 PM in GMT, which is 9:00 AM to 11:00 AM in MDT.