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Wyoming2020Enacted

HB0044

Mountain Daylight Time Preservation Act

Last scannedAug 25, 2026, 2:25 AM

In one sentence

This law sets Wyoming's time to Mountain Daylight Time year-round, contingent on federal legislation and similar laws from at least four western states.

What it does

  • Sets the legal time in Wyoming to be Mountain Daylight Time (MDT) throughout the whole year.
  • Exempts Wyoming from observing Mountain Standard Time (MST).
  • Requires that this law takes effect on the first Sunday of November after federal legislation allows states to observe daylight saving time all year and at least four western states pass similar laws.

Who it affects

  • People living in Wyoming
  • Government agencies in Wyoming

Limits and unknowns

  • This law will not take effect until federal legislation allows states to observe daylight saving time all year.
  • At least four western states must also pass similar laws before this act can start in Wyoming.

Plain language

Terms to know

Mountain Daylight Time (MDT)
The time zone used by Wyoming when it is one hour ahead of Mountain Standard Time.
Mountain Standard Time (MST)
The standard time for the mountain region, which is one hour behind MDT.

Official record

Sources

Validated

Official summary

Bill Summary - 20LSO-0312 Bill No.: HB0044 Effective: Multiple Dates LSO No.: 20LSO-0312 Enrolled Act No.: HEA No. 0087 Chapter No.: 134 Prime Sponsor: Laursen Catch Title: Mountain daylight time preservation. Subject: Wyoming daylight saving time made year round . Summary/Major Elements: The bill would place Wyoming on Mountain daylight time year round . Comments: The bill will not take effect until the first Sunday of November following: Legislation enacted by Congress amending 15 U.S.C. § 260a to allow states to observe daylight saving time year round . Four (4) western states, including Wyoming, having passed legislation to adopt year round daylight saving time. The Governor shall inform the Management Council of the legislature of the date this bill takes effect. The above summary is not an official publication of the Wyoming Legislature and is not an official statement of legislative intent. While the Legislative Service Office endeavored to provide accurate information in this summary, it should not be relied upon as a comprehensive abstract of the bill.

Public statements

Why lawmakers voted

Last checked Aug 6, 6:05 AM

Voted Yes

Why they voted this way

The lawmaker supports voting aye because the bill was amended to remove confusing references about moving to central time, aligning it with other western states' legislation while keeping Montana on mountain daylight time if federal law permits.

Public statementFloor statement at 1:52:42 Watch the statement
Voted Yes

Why they voted this way

The lawmaker supports voting aye on the motion to concur with Senate amendments after initially forgetting to state his position during the roll call explanation.

Public statementFloor statement at 1:53:28 Watch the statement
Voted No

Why they voted this way

The lawmaker supports the bill because it keeps daylight savings time in effect all year round without changing the clock, which they believe is important for many people.

Public statementFloor statement at 1:18:58 Watch the statement

If a lawmaker is not listed, we couldn't find a published reason.

Wyoming roll calls

Recorded votes

6 roll calls

H Concur:Passed 45-13-2-0-02020-03-12 · House45 yes 13 no
S 3rd Reading:Passed 17-11-2-0-02020-03-11 · Senate17 yes 11 no
S04 - Education:Recommend Do Pass 3-2-0-0-02020-03-04 · Senate3 yes 2 no
H 3rd Reading:Passed 32-27-1-0-02020-02-26 · House32 yes 27 no
H06 - Travel:Recommend Do Pass 8-1-0-0-02020-02-17 · House8 yes 1 no
H Introduced and Referred to H06 - Travel 43-15-2-0-02020-02-11 · House43 yes 15 no

Official activity

Bill history

  1. Assigned Chapter Number 134LSO
  2. Governor Signed HEA No. 0087 Governor
  3. S President Signed HEA No. 0087Senate
  4. H Speaker Signed HEA No. 0087House
  5. Assigned Number HEA No. 0087LSO
  6. H Concur:Passed 45-13-2-0-0House
  7. H Received for ConcurrenceHouse
  8. S 3rd Reading:Passed 17-11-2-0-0Senate
  9. S 2nd Reading:PassedSenate
  10. S COW:PassedSenate
  11. S Placed on General FileSenate
  12. S04 - Education:Recommend Do Pass 3-2-0-0-0Senate
  13. S Introduced and Referred to S04 - EducationSenate
  14. S Received for IntroductionSenate
  15. H 3rd Reading:Passed 32-27-1-0-0House
  16. H 2nd Reading:PassedHouse
  17. H COW:PassedHouse
  18. H Placed on General FileHouse
  19. H06 - Travel:Recommend Do Pass 8-1-0-0-0House
  20. H Introduced and Referred to H06 - Travel 43-15-2-0-0House

Changes

Amendments

2 stored

HB0044S2001

The amendment removes North Dakota from a list mentioned in the bill.

HB0044SW001

The amendment changes HB0044 to require Wyoming to observe Mountain Daylight Time year-round instead of transferring time zones.