https://www.merriam-webster.com/dictionary/Mountain%20Daylight%20Time
MOUNTAIN DAYLIGHT TIME Definition & Meaning - Merriam-Webster
The meaning of MOUNTAIN DAYLIGHT TIME is Mountain Time observed during that part of the year when Daylight Saving Time is in effect.
mountain daylight timedefinitionmeaningmerriamwebster
https://www.worldtimeserver.com/time-zones/mdt/
Mountain Daylight Time Zone - MDT
Nov 21, 2015 - Mountain Daylight Time is six hours behind the Coordinated Universal Time standard, written as an offset of UTC - 6:00.
mountain daylight timezonemdt