CalendarHours
Home / Time Zones / U.S. Time Zones / Wyoming
Wyoming • Live Time-Zone Reference

Wyoming Time Zone

Wyoming uses Mountain Time (MT) statewide. Cheyenne, Casper, Laramie, Gillette, Rock Springs, Jackson, Cody and all 23 Wyoming counties share the same official civil time. Wyoming uses MST at UTC−07:00 during standard time and MDT at UTC−06:00 during daylight saving time.

Quick answer: Wyoming has one time zone and no internal time-zone boundary. Use America/Denver for date-aware software calculations. Yellowstone, Grand Teton and Jackson Hole all use the same Mountain Time clock as Cheyenne and Casper.
Time zones1Mountain Time statewide
Standard timeMSTUTC−07:00
Daylight timeMDTUTC−06:00
Wyoming Time Zone at a Glance Current Time in Wyoming Wyoming on the U.S. Time Zone Map
Search a Wyoming city, county, park, Mountain Time abbreviation, UTC offset, related state or time-zone tool.
Popular: U.S. Time Zones Mountain Time MST MDT Wyoming Time Now Mountain Time Zone Map Daylight Saving Time

Wyoming Time Zone at a Glance

Wyoming is a one-zone state. Every county, major city and national-park gateway uses Mountain Time, while the abbreviation and UTC offset change seasonally with daylight saving time.

MT

Mountain Time in Wyoming

The entire state follows Mountain Time, including all 23 counties and every major Wyoming community.

Mountain Time details → MST

Mountain Standard Time

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

See MST time now → MDT

Mountain Daylight Time

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

See MDT time now → DST

Wyoming Daylight Saving Time

Wyoming currently changes clocks in March and November under the U.S. daylight-saving schedule.

See DST rules → WY

Current Time in Wyoming

Use the statewide current-time page for live Cheyenne, Casper, Jackson and other Wyoming clocks.

See Wyoming time now → ⇄

Wyoming Time Converter

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

Convert Wyoming time →

Wyoming Time Zone by Major City & Region

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

Current time across Wyoming →
Wyoming LocationCurrent TimeCurrent AbbreviationCurrent UTC OffsetReference
Cheyenne · Laramie CountyLive——State capital time
Casper · Natrona CountyLive——Central Wyoming
Laramie · Albany CountyLive——Southeast Wyoming
Gillette · Campbell CountyLive——Northeast Wyoming
Rock Springs · Sweetwater CountyLive——Southwest Wyoming
Jackson · Teton CountyLive——Jackson Hole reference
Cody · Park CountyLive——Yellowstone gateway
Sheridan · Sheridan CountyLive——North-Central Wyoming
Mountain Time Zone Current Time in Wyoming U.S. Time Zone Map

Wyoming Time-Zone Guides & Related References

Continue with Mountain Time, the official related state references, statewide current time, border context, daylight-saving guidance and the correct visual owners.

All U.S. time zones →
Statewide zoneMountain TimeThe time zone used throughout Wyoming.→ Standard timeMSTUTC−07:00 during standard time.→ Daylight timeMDTUTC−06:00 while DST is active.→ Official related stateUtahStatewide Mountain Time neighbor southwest of Wyoming.→ Official related stateNew MexicoAnother statewide Mountain Time reference.→ Live statewide timeCurrent Time in WyomingCheyenne, Casper, Jackson and other Wyoming city clocks.→ Southern neighborColoradoMountain Time continues across Wyoming's southern border.→ Two-zone neighborIdahoThe Idaho counties adjoining Wyoming are on Mountain Time.→ Two-zone neighborSouth DakotaThe western counties adjoining Wyoming are on Mountain Time.→ Visual referenceU.S. Time Zone MapWyoming map intent consolidates here.→ Zone mapMountain Time Zone MapSee Wyoming inside the broader Mountain region.→ Seasonal rulesDaylight Saving TimeCurrent U.S. clock-change dates and rules.→
One Wyoming Clock

Wyoming Mountain Time & UTC Now

Wyoming has one statewide civil time, but its UTC offset changes seasonally. The live cards compare Wyoming with New York and UTC while keeping the current MST/MDT status date-aware.

Mountain Time MST MDT UTC Offsets Time Zone Difference
Wyoming · Mountain TimeLive timeAmerica/Denver · current abbreviation and offset
New York · Eastern TimeLive timeNormally two hours ahead of Wyoming.
UTC ReferenceLive timeCoordinated Universal Time · UTC+00:00
Wyoming Counties23Every county uses Mountain Time.

Wyoming UTC Offset & Regional Reference

Wyoming has no regional UTC-offset split. Every city, county and national-park area changes together between MST at UTC−07:00 and MDT at UTC−06:00.

Explore UTC offsets →
Wyoming AreaIANA ZoneCurrent TimeCurrent UTC OffsetSeasonal Rule
Cheyenne / Southeast WyomingAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Casper / Central WyomingAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Jackson Hole / Teton CountyAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Yellowstone / Northwest WyomingAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Gillette / Northeast WyomingAmerica/DenverLive—MST UTC−07 → MDT UTC−06
Rock Springs / Southwest WyomingAmerica/DenverLive—MST UTC−07 → MDT UTC−06

Do Wyoming Borders Change the Clock?

No at ordinary direct land crossings under current rules. Montana, Colorado and Utah use Mountain Time statewide. South Dakota and Nebraska are split states, but their counties along the Wyoming border are on Mountain Time. Idaho is also split, but the Idaho side of the Wyoming border is in Mountain Time.

South Dakota Time Zone Nebraska Time Zone Idaho Time Zone Mountain Time Zone Map

Wyoming Standard Time vs Daylight Time

Wyoming currently observes the U.S. daylight-saving schedule statewide. In 2026 the state advanced clocks on March 8 and is scheduled to return to standard time on November 1.

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

Compare Wyoming Mountain Time

Compare Wyoming with New York, Chicago, Los Angeles, Phoenix 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 Wyoming Time Works

Six facts explain nearly every Wyoming time-zone question, from statewide Mountain Time to all 23 counties, Yellowstone, border travel, IANA calculations and Wyoming's contingent permanent-daylight-time law.

01 · Statewide

Wyoming Has One Time Zone

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

02 · Counties

All 23 Counties Share One Clock

Every Wyoming county follows the same MST/MDT schedule, from Teton and Park to Laramie and Campbell counties.

03 · National Parks

Yellowstone & Grand Teton Use Mountain Time

Wyoming's major national-park destinations stay on the same clock as Cheyenne, Casper and Jackson.

04 · Borders

Direct Border Crossings Stay on Mountain Time

Even along split-state neighbors South Dakota, Nebraska and Idaho, the Wyoming-facing border areas are Mountain Time.

05 · IANA

Use America/Denver

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

06 · State Law

§ 8-4-115 Is Conditional, Not Active

Wyoming has enacted a contingent year-round MDT rule, but the federal and multi-state trigger conditions have not been completed.

Does All of Wyoming Have the Same Time?

Yes. All 23 Wyoming counties use Mountain Time. The counties are Albany, Big Horn, Campbell, Carbon, Converse, Crook, Fremont, Goshen, Hot Springs, Johnson, Laramie, Lincoln, Natrona, Niobrara, Park, Platte, Sheridan, Sublette, Sweetwater, Teton, Uinta, Washakie and Weston.

The same rule covers Wyoming's best-known travel regions. Cheyenne and Laramie in the southeast, Casper in central Wyoming, Gillette in the northeast, Rock Springs in the southwest, Jackson Hole and Grand Teton in the west, and Yellowstone in the northwest all share the same official Mountain Time clock.

23 countiesEvery Wyoming county follows the same official Mountain Time rules.
Yellowstone & Grand TetonBoth national-park destinations use Mountain Time; Yellowstone's Montana and Idaho portions also remain on Mountain Time.
No in-state zone lineYou never change official time zones simply by traveling within Wyoming.
Current Time in WyomingMountain Time Zone

Is Wyoming Making Daylight Saving Time Permanent?

No permanent change is in force as of August 20, 2026. Wyoming Statute § 8-4-115, enacted through 2020 HB 44, creates a contingent rule for year-round Mountain Daylight Time. The statute is expressly marked contingently effective.

The trigger requires two things: federal legislation must take effect authorizing states to observe daylight saving time year-round, and at least four western states, including Wyoming, must enact qualifying year-round daylight-time laws. Wyoming's Legislative Service Office still lists the effective date as indeterminate. Those conditions have not taken effect, so Wyoming continues to alternate between MST and MDT under the current U.S. schedule.

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

Wyoming on the U.S. Time Zone Map

Wyoming sits entirely inside Mountain Time. The most useful visual context is around the state borders: the Central–Mountain boundary lies farther east in South Dakota and Nebraska, while the Mountain–Pacific boundary lies farther west in Idaho. No federal U.S. time-zone line crosses Wyoming itself.

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

Looking for the Current Time in Wyoming?

This page explains Wyoming's time zone, UTC offsets, abbreviations, DST, borders and state law. If your main question is what time it is right now in Cheyenne, Casper, Jackson, Yellowstone or anywhere else in Wyoming, use the statewide current-time page.

Statewide current timeCurrent Time in Wyoming
Statewide zoneMountain Time Zone
Visual zone referenceMountain Time Zone Map
U.S. visual contextU.S. Time Zone Map

Sources & Methodology

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

The IANA Time Zone Database is the primary rules source for civil offsets and transitions. U.S. daylight-saving dates are checked against NIST. Wyoming's 23-county structure and state geography are checked against official Wyoming government sources. Current permanent-daylight-time policy is checked against W.S. § 8-4-115, the 2020 HB 44 legislative summary and the Legislative Service Office delayed-effective-date report. Federal Mountain–Pacific and Central–Mountain boundary rules provide interstate map context.

IANA — Time Zone Database NIST — Daylight Saving Time Rules State of Wyoming — Geography & 23 Counties Wyoming Statutes — § 8-4-115 Mountain Daylight Time Wyoming Legislature — HB 44 Permanent-MDT Contingency 49 CFR § 71.9 — Mountain–Pacific Boundary

Reviewed August 20, 2026. IANA architecture baseline: tzdb 2026c. Live clocks, current abbreviations and UTC offsets update automatically from supported browser time-zone data.

Wyoming Time Zone FAQ

What time zone is Wyoming in?

Wyoming 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 Wyoming?

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

Does all of Wyoming have the same time?

Yes. Cheyenne, Casper, Laramie, Gillette, Rock Springs, Jackson, Cody and all 23 counties share the same official Mountain Time rules.

What time zone is Cheyenne in?

Cheyenne is in Mountain Time and uses MST during standard time and MDT during daylight saving time. For a live clock, see Current Time in Wyoming.

What time zone is Jackson, Wyoming in?

Jackson and the Jackson Hole area are in Mountain Time and follow the same MST/MDT schedule as Cheyenne and the rest of Wyoming.

What is Wyoming's UTC offset?

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

Does Wyoming observe daylight saving time?

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

Is Wyoming on MST or MDT right now?

Wyoming 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 Wyoming?

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

How many counties are in Wyoming?

Wyoming has 23 counties, and every county uses Mountain Time.

Is Yellowstone National Park in the same time zone as Wyoming?

Yes. Yellowstone uses Mountain Time, including its small Montana and Idaho portions, so traveling through Yellowstone does not create a time-zone change.

Do I change time when crossing Wyoming's state borders?

Not at ordinary direct crossings under current rules. The adjoining portions of Montana, South Dakota, Nebraska, Colorado, Utah and Idaho are all in Mountain Time.

Is Wyoming making daylight saving time permanent?

No permanent change is in force as of August 20, 2026. W.S. § 8-4-115 remains contingent on federal authorization and qualifying permanent-daylight-time laws in at least four western states including Wyoming.