49 CFR Part 71 — Standard Time Zone Boundaries

Daylight Saving Time

IANA tzdb zone1970.tab

Uniform Time

Time Zone Database Release 2026d

Montana follows the federal daylight-saving schedule.

U.S. Census Bureau TIGERweb Incorporated Places (ACS 2026)

town

city

consolidated city balance

incorporated place

Montana

Montana has 127 Census-recognized incorporated places as of January 1, 2026, including 73 towns, 52 cities, 1 consolidated city balance, and 1 incorporated place.

All of Montana is legally in Mountain Time.

Montana is entirely in Mountain Time and observes daylight saving time statewide.

Most Mountain Time areas advance to UTC-06:00 for daylight saving time. Most of Arizona remains on UTC-07:00 year-round; the Navajo Nation observes daylight saving time.

Mountain Time

Mountain Time covers much of the interior West. Its normal offsets are UTC-07:00 in standard time and UTC-06:00 in daylight time, with the important Arizona exception.

Time Zones in Montana

Time-zone coverage

Mountain Time

Daylight saving time in Montana

Check an address near a boundary