Tidssone
- For tiden Mountain Daylight Time (MDT), UTC -6
- Vintertid (Mountain Standard Time (MST), UTC -7) starter 4. november 2018
IANA-id-ene for Mountain Time er America/Boise, America/Cambridge_Bay, America/Denver, America/Edmonton, America/Inuvik, America/Ojinaga og America/Yellowknife.