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Montana • Live Time-Zone Reference

Montana Time Zone

Montana uses Mountain Time (MT) statewide. Billings, Missoula, Great Falls, Bozeman, Butte, Helena, Kalispell, Miles City and all 56 Montana counties share the same official civil time. Montana uses MST at UTC−07:00 during standard time and MDT at UTC−06:00 during daylight saving time.

Quick answer: Montana has one time zone and no internal time-zone boundary. Use America/Denver for date-aware software calculations. Montana currently observes daylight saving time, so the entire state changes between MST and MDT together.
Time zones1Mountain Time statewide
Standard timeMSTUTC−07:00
Daylight timeMDTUTC−06:00
Montana Time Zone at a Glance Current Time in Montana Montana on the U.S. Time Zone Map
Search a Montana city, Mountain Time abbreviation, UTC offset, related state or time-zone tool.
Popular: U.S. Time Zones Mountain Time MST MDT Montana Time Now Mountain Time Zone Map Daylight Saving Time

Montana Time Zone at a Glance

Montana is a one-zone state, but the abbreviation and UTC offset change seasonally because daylight saving time is currently observed.

MT

Mountain Time in Montana

The entire state follows Mountain Time, including all 56 counties and every major Montana city.

Mountain Time details → MST

Mountain Standard Time

Montana uses MST at UTC−07:00 during the standard-time portion of the year.

See MST time now → MDT

Mountain Daylight Time

Montana uses MDT at UTC−06:00 while daylight saving time is in effect.

See MDT time now → DST

Montana Daylight Saving Time

Montana currently changes clocks in March and November under the U.S. DST schedule.

See DST rules → ◷

Current Time in Montana

Use the statewide current-time page for the live Montana clock, current date and city comparisons.

See Montana time now → ⇄

Montana Time Converter

Convert Montana time to another U.S. or world location for a specific date and time.

Convert Montana time →

Montana Time Zone by Major City

Every major Montana city shares the same Mountain Time clock. Current abbreviations and UTC offsets below update automatically with the date.

Current time across Montana →
Montana LocationCurrent TimeCurrent AbbreviationCurrent UTC OffsetReference
Billings · Yellowstone CountyLive——Montana reference
Missoula · Missoula CountyLive——Western Montana reference
Great Falls · Cascade CountyLive——North-Central Montana reference
Bozeman · Gallatin CountyLive——Southwest Montana reference
Butte · Silver Bow CountyLive——Southwest Montana reference
Helena · Lewis and Clark CountyLive——State capital time
Kalispell · Flathead CountyLive——Northwest Montana reference
Miles City · Custer CountyLive——Eastern Montana reference
Mountain Time Zone Current Time in Montana U.S. Time Zone Map

Montana Time-Zone Guides & Related References

Continue with the Mountain Time family, official related state references, Montana current time and visual U.S. time-zone geography.

All U.S. time zones →
Statewide zoneMountain TimeThe time zone used throughout Montana.→ Standard timeMSTUTC−07:00 during standard time.→ Daylight timeMDTUTC−06:00 while DST is active.→ Official related stateNew MexicoAnother statewide Mountain Time reference.→ Official related stateUtahAnother statewide Mountain Time reference.→ Live statewide timeCurrent Time in MontanaCurrent Montana clock, date and city comparisons.→ Western borderIdahoPacific and Mountain Time meet near Montana's western border.→ Eastern borderNorth DakotaA two-zone neighbor with Mountain Time along much of western North Dakota.→ Visual referenceU.S. Time Zone MapMontana map intent consolidates here.→ Zone mapMountain Time Zone MapSee Montana inside the broader Mountain Time region.→ Seasonal rulesDaylight Saving TimeCurrent U.S. clock-change dates and rules.→ U.S. directoryU.S. Time ZonesAll state references and major U.S. zones.→
One Montana Clock

Montana Mountain Time & UTC Now

Montana has one statewide civil time, but its UTC offset changes seasonally. The live cards compare Montana with UTC and Chicago while keeping the state's current MST/MDT status date-aware.

Mountain Time MST MDT UTC Offsets Time Zone Difference
Montana · Mountain TimeLive timeAmerica/Denver · current abbreviation and offset
Chicago · Central TimeLive timeNormally one hour ahead of Montana.
UTC ReferenceLive timeCoordinated Universal Time · UTC+00:00
Montana Counties56Every county uses Mountain Time.

Montana UTC Offset & Regional Reference

Montana has no regional UTC-offset split. Every city and county changes together between MST at UTC−07:00 and MDT at UTC−06:00.

Explore UTC offsets →
Montana AreaIANA ZoneCurrent TimeCurrent UTC OffsetSeasonal Rule
Billings / South-Central MontanaAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Missoula / Western MontanaAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Great Falls / North-Central MontanaAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Bozeman / Southwest MontanaAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Kalispell / Northwest MontanaAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Miles City / Eastern MontanaAmerica/DenverLive—MST UTC−07 → MDT UTC−06

Montana–Idaho Border: Where Does the Clock Change?

Idaho uses two time zones, so the answer depends on the crossing. Northern Idaho is on Pacific Time. On I-90 near Lookout Pass, crossing east from Idaho into Montana moves from Pacific Time to Mountain Time and advances the clock one hour. Farther south, Idaho's Mountain Time area already matches Montana.

Idaho Time Zone Pacific Time Zone Mountain Time Zone U.S. Time Zone Map

Montana Standard Time vs Daylight Time

Montana currently observes the U.S. daylight-saving schedule. The entire state changes clocks together because there is no internal time-zone boundary.

Daylight Saving Time guide →
Montana ZoneStandard TimeStandard OffsetDaylight TimeDaylight Offset
Mountain Time · entire stateMSTUTC−07:00MDTUTC−06:00
Montana DST Rules When DST Starts When DST Ends DST by State

Compare Montana Mountain Time

Compare Montana with Chicago, New York, Los Angeles or another location. The live comparison uses current civil-time rules rather than assuming a fixed year-round difference.

Live time
Current abbreviation and UTC offset
Live time
Current abbreviation and UTC offset
Open Full Converter Time Zone Difference

How Montana Time Works

Six facts explain nearly every Montana time-zone question, from statewide Mountain Time to Idaho border changes, Canada and Montana's conditional permanent-DST law.

01 · Statewide

Montana Has One Time Zone

The entire state uses Mountain Time. There is no Central or Pacific Time area inside Montana.

02 · Counties

All 56 Counties Share One Clock

Every Montana county follows the same official Mountain Time and daylight-saving rules.

03 · Cities

Billings, Bozeman & Missoula Match

Montana's major cities all use the same MST/MDT schedule, from Billings in the east to Missoula in the west.

04 · Idaho

Some Western Crossings Change Time

Northern Idaho uses Pacific Time, so routes such as I-90 at Lookout Pass cross a one-hour zone boundary at Montana.

05 · IANA

Use America/Denver

America/Denver is the correct date-aware IANA zone for current and future Montana civil-time calculations.

06 · Law

Permanent MDT Is Conditional

Montana enacted a trigger-based permanent-MDT law in 2021, but the required regional and federal conditions have not taken effect.

Does All of Montana Have the Same Time?

Yes. Montana uses Mountain Time statewide. All 56 counties—from Lincoln County near Idaho and British Columbia to Richland and Wibaux counties near North Dakota—share the same MST/MDT framework. Billings, Helena, Great Falls, Bozeman, Missoula and every other Montana community change clocks together.

56 countiesEvery Montana county follows the same official Mountain Time rules.
No in-state zone lineYou never change official time zones simply by traveling between Montana communities.
One seasonal switchWhen Montana moves between MST and MDT, the entire state changes together.
Current Time in MontanaMountain Time Zone

Does Montana Have Permanent Daylight Saving Time?

Not yet. Montana enacted Senate Bill 254 in 2021 to authorize year-round Mountain Daylight Time, but the law has a contingent effective date. It requires at least four designated western states—including Montana—to approve year-round daylight time, plus either federal legislation authorizing permanent DST or U.S. Department of Transportation approval of a time-zone transfer.

The designated western states are Idaho, Montana, North Dakota, South Dakota, Utah and Wyoming. Because the required federal condition has not taken effect as of August 20, 2026, Montana still observes MST in standard time and MDT during daylight saving time. The current 2026 fall-back remains scheduled for November 1 at 2:00 a.m. local time.

Daylight Saving Time Is Daylight Saving Time Ending? Mountain Time Zone Time Zone Chart
Visual Geography

Montana on the U.S. Time Zone Map

Montana sits entirely inside Mountain Time, but its western edge meets Idaho's two-zone system. The U.S. and Mountain Time maps make that contrast easier to see without implying that Montana itself contains a time-zone boundary.

U.S. Time Zone Map Mountain Time Zone Map World Time Zone Map

Looking for the Current Time in Montana?

This page explains Montana's time zone, UTC offsets, abbreviations and DST. If your main question is what time it is in Montana right now, use the statewide current-time page.

Statewide current timeCurrent Time in Montana
Statewide zoneMountain Time Zone
Standard timeMST Time Now
Daylight timeMDT Time Now

Sources & Methodology

CalendarHours uses location-aware, date-aware time-zone logic rather than permanently hardcoding Montana as UTC−7 or UTC−6. America/Denver supplies the Mountain Time rules used throughout the state.

The IANA Time Zone Database is the primary rules source for civil offsets and transitions. The latest release verified for this page is tzdb 2026c, released July 8, 2026. U.S. daylight-saving dates are checked against NIST. Montana's 56-county geography is checked against the Montana State Library, and Montana's conditional year-round MDT law is checked against Senate Bill 254 and the 2021 Montana Session Laws.

IANA — Time Zone Database NIST — Daylight Saving Time Rules Montana State Library — 56 Counties Montana Legislature — Senate Bill 254 British Columbia — Permanent Daylight Saving Time Alberta — New Permanent Time System

Reviewed August 20, 2026. This URL is evergreen; live Montana clocks, abbreviations and UTC offsets update automatically. Legislative and cross-border permanent-time changes are dated where necessary.

Montana Time Zone FAQ

What time zone is Montana in?

Montana is entirely in Mountain Time. The state uses MST (UTC−07:00) during standard time and MDT (UTC−06:00) during daylight saving time.

How many time zones are in Montana?

Montana has one official time zone: Mountain Time. There is no internal time-zone boundary.

Does all of Montana have the same time?

Yes. Billings, Missoula, Great Falls, Bozeman, Butte, Helena, Kalispell and all 56 counties share the same official Mountain Time rules.

What time zone is Billings, Montana in?

Billings is in Mountain Time and follows the same MST/MDT schedule as the rest of Montana.

What time zone is Bozeman in?

Bozeman is in Mountain Time and follows the same MST/MDT schedule as Billings, Helena and the rest of Montana.

What is Montana's UTC offset?

Montana is UTC−07:00 during Mountain Standard Time and UTC−06:00 during Mountain Daylight Time.

Does Montana observe daylight saving time?

Yes. In 2026, daylight saving time in Montana runs from March 8 at 2:00 a.m. local time to November 1 at 2:00 a.m. local time.

Is Montana on MST or MDT right now?

Montana uses MST during standard time and MDT during daylight saving time. The live clock above calculates the current abbreviation from the date.

What IANA time zone should I use for Montana?

Use America/Denver for current and future Montana civil-time calculations.

Does Montana have permanent daylight saving time?

Not yet. Montana's 2021 SB 254 authorizes year-round MDT only after specified regional and federal conditions are met. Those conditions have not taken effect as of August 20, 2026.

Do I change time when driving from Idaho into Montana?

Sometimes. Northern Idaho uses Pacific Time, so eastbound I-90 at Lookout Pass crosses into Mountain Time and advances the clock one hour. Southern Idaho's Mountain Time area already matches Montana.

How does Montana time compare with Canada in 2026?

During Montana's 2026 MDT period, Montana is UTC−06. British Columbia is UTC−07 year-round, while Saskatchewan is UTC−06 year-round and Alberta transitions to permanent UTC−06 beginning in November 2026. After Montana returns to MST on November 1, Montana is UTC−07 while Alberta and Saskatchewan are UTC−06.