MDT — Mountain Daylight Time
MDT is Mountain Daylight Time, -06:00, used in North America. In code, use America/Denver rather than the abbreviation.
Use the IANA name, not the abbreviation
Python
from datetime import datetime
from zoneinfo import ZoneInfo
# right: an IANA zone carries the full history of rule changes
now = datetime.now(ZoneInfo("America/Denver"))
print(now.isoformat(), now.tzname())
# wrong: an abbreviation is not resolvable, and a hard-coded offset
# silently rots the next time the rules change
# now = datetime.now(timezone(timedelta(hours=...))) # don'tMDT questions
What does MDT stand for?
MDT is Mountain Daylight Time, -06:00, used in North America. The IANA zone to use in code is America/Denver.
What time is it in MDT right now?
Mountain Daylight Time: 18:15 on Wednesday (MDT).
Which IANA timezone should I use instead of MDT?
America/Denver for Mountain Daylight Time. Date libraries cannot resolve bare abbreviations, and an abbreviation carries no daylight-saving history, so a stored offset silently rots when a government changes the rules.