It’s that time of the year when we move the clocks forward one hour, ending standard time and returning to daylight saving time. Those who enjoy more daylight hours rejoice. 


What You Need To Know

  • Introduced over 100 years ago, daylight saving time was a way to save fuel during World War I. 

  • The Sunshine Act passed in the Senate in 2022, but a year later remains stalled in the House

  • A federal law in place does not allow for permanent daylight saving time.

Yet this brings up the conversation of why not just stay on daylight saving time year round? Folks in Missouri are keeping that conversation going and have gone as far as introducing bills into state legislature.

However, it’s not that easy. The path to accomplish this includes federal approval.  

Why we switched the clocks in the first place

The United States began the concept of daylight saving time in 1918, during World War I, to save fuel. The thought was that by advancing one hour ahead, coal-fired energy would assist the war effort rather than that hour at home.

Standard time returned following the war and continued until World War II. After World War II, some states and even cities kept daylight saving time, creating various time zones within regions. Frustrated with no uniform time, the public pushed Congress to pass the Uniform Time Act in 1966.

This established the time frame that daylight saving time would begin the last Sunday in April and end the last Sunday in October.

In 1987, it extended to include the first Sunday in April and end on the last Sunday in October.

Part of the Energy Policy Act of 2005, the modern daylight saving time begins on the second Sunday in March and ends on the first Sunday in November.

This current time shift began in 2007.

Not all states participate

Hawaii doesn’t take part because of its location. With not much variation throughout the year between sunrise and sunset, it made little sense to switch the clocks. 

Only the Navajo Nation in Arizona observes daylight saving time. The rest of the state exempted itself in 1968. 

They cited the heat as their reason for opting out, adding that if they switched the clocks ahead one hour, the sun would not set until 9 p.m. in the summer, limiting nighttime activities.

Current legislation

The Department of Transportation oversees daylight saving time and all the country’s time zones. 

According to the National Conference of State Legislatures (NCSL), “Federal law allows a state to exempt itself from observing daylight saving time, upon action by the state legislature, but does not allow the permanent observance of DST.”

While Arizona exempted itself from daylight saving time, 19 other states, including Missouri, have enacted legislation or passed resolutions to provide for year-round daylight saving time. 

Clocks depicting daylight saving time. (AP Photo/Charles Krupa)

Some movement

On March 15, 2022, the U.S. Senate voted unanimously in favor of the Sunshine Protection Act, which would make daylight saving time permanent, meaning Americans would no longer have to change their clocks twice a year to account for the time change. 

While the Senate passed the bill, a year later it remains stalled in the House. 

Missouri and DST

Missouri introduced a bill in 2022, establishing “Daylight Saving as New Standard Time Pact."

This bill said that all areas of the state will no longer observe daylight saving provisions of federal law, meaning Missouri would permanently switch their clocks to daylight saving. However, the legislation failed. 

Of the eight states that border Missouri, five agree, rallying to change to permanent daylight saving time. 

Oklahoma would prefer to stay on standard time year-round, and Arkansas and Tennessee have no pending legislation about this change.

Making it more difficult is that regardless of resolutions passed in state legislature, federal law does not allow full-time daylight saving time, thus, Congress would have to act before states could adopt changes.

Looking forward

For now, only three states, Florida, Kentucky and Colorado, have enacted legislation to observe daylight saving time year-round, but because of the federal law, this amendment remains pending.

Other states will continue to perform case studies and collect data to see if this shift is beneficial in saving energy, helping improve health and reducing crime.

And so we will change our clocks forward one hour this Sunday and then on Nov. 5, 2023, we will change the clocks back one hour, returning to standard time. 

Our team of meteorologists dives deep into the science of weather and breaks down timely weather data and information. To view more weather and climate stories, check out our weather blogs section.