DST is observed in some of this time zone. ... In the United States and Canada, this time zone is generically called Mountain Time (MT). Specifically, it is Mountain Standard Time (MST) when observing standard time, and Mountain Daylight Time (MDT) when observing daylight saving time.

Does the Navajo Nation observe daylight Savings time?

According to timeanddate.com the Navajo Nation follows the United States DST Schedule because its territory goes beyond Arizona into states that follow DST. ... Observing DST allows everyone on the vast reservation to live by the same clock schedule.

What three US states do not observe daylight saving time?

Currently, two states (Arizona and Hawaii) and the U.S. territories of Puerto Rico, the U.S. Virgin Islands, American Samoa and Guam don't observe daylight saving time.