Tidssone
- For tiden Mountain Standard Time (MST), UTC -7
- Sommertid (Mountain Daylight Time (MDT), UTC -6) starter 10. mars 2019
IANA-id-ene for Mountain Time er America/Boise, America/Cambridge_Bay, America/Denver, America/Edmonton, America/Inuvik, America/Ojinaga og America/Yellowknife.