Daylight saving time remains a contentious issue nearly 60 years after Congress passed the Uniform Time Act, with some states still trying to skip the twice-yearly time change.

In most parts of the United States, clocks are set forward one hour in the spring and set back one hour in the fall. However, some states either want to abandon this practice entirely or move their clocks forward and never back.

Here’s what you need to know:

When do the clocks change this year?

Under federal law, states that participate in Daylight Saving Time will turn their clocks back at 2 a.m. on the first Sunday in November, which falls on Nov. 3 this year.

The clocks will then be set forward on the second Sunday in March 2025, which falls on March 9th.

Do all states participate in Daylight Saving Time?

Most states participate in the twice-yearly time change, but Arizona and Hawaii do not, having opted out of the practice.

Can states determine their own time?

Under the provisions of the Uniform Time Act, states have the option of either participating in daylight saving time and committing to moving clocks forward and back on designated days, or foregoing it altogether and maintaining standard time year-round.

Under the terms of the law, states cannot elect to maintain daylight saving time permanently.

However, many states have passed laws that would switch them to year-round daylight saving time if Congress changes the Uniform Time Act. According to KGW, Alabama, Colorado, Florida, Georgia, Louisiana, Maine, Minnesota, Missouri, Oklahoma, South Carolina and Tennessee all have laws in place that would allow states to observe permanent daylight saving time if Congress allowed them to do so it.

Is there a move to implement year-round daylight saving time in Illinois, Indiana?

According to lawmakers, laws have been proposed to keep Illinois on permanent daylight saving time, but none have been passed by the General Assembly.

The same is true in Indiana, where most of the state operates on Eastern Time and northwestern counties Lake, Porter, LaPorte, Newton and Jasper operate on Central Time.

In Michigan, a referendum was proposed to voters that would have allowed a vote on daylight saving time. However, the referendum was referred to committee and was not passed in time for the 2024 election.