Think Halloween is scary? Wait until Sunday’s sunset.

Why does it get dark earlier after Halloween? Two things are happening at once. Daylight saving time ends Sunday morning, moving sunset about an hour earlier on our clocks, while Earth's tilted axis continues shortening the days as winter approaches.

In other words, we're not actually losing an hour of sunlight overnight. We're just moving it from the evening to the morning.

Which seems like a perfectly reasonable thing to do, assuming your favorite hobby is driving home from work in the dark.

And this Halloween, the timing couldn't be more appropriate.

The ghosts and goblins get Saturday night. By Sunday evening, darkness takes over the neighborhood without even bothering to wear a costume.

Why does it get dark earlier so suddenly on Sunday?

At 2 a.m. Sunday, November 1, daylight saving time ends across most of the United States. Clocks move backward one hour, returning us to standard time.

That means 2 a.m. becomes 1 a.m., giving us an extra hour overnight.

Sounds like a treat, right?

Well, there's a trick waiting Sunday evening.

In Chicago, Saturday's sunset is at 5:46 p.m. By Sunday, it's 4:45 p.m. In New York City, sunset jumps from 5:53 to 4:52 p.m.

Seattle drops to 4:51 p.m. Boston gets an especially creepy 4:37 p.m. sunset.

Even sunny Miami goes from 6:40 p.m. Saturday to 5:39 p.m. Sunday.

And in northern Maine, sunset arrives around 4:16 p.m.

That's not an early evening. That's the afternoon packing its bags and leaving without saying goodbye.

Why are the days still getting shorter?

Even if we never touched another clock, daylight would continue shrinking through much of autumn.

The reason is Earth's 23.4-degree axial tilt.

As the Northern Hemisphere tilts farther away from the Sun during autumn, the Sun follows a lower, shorter path across our sky.

It rises later, sets earlier, and spends less time above the horizon.

The farther north you live, the more dramatic that seasonal change becomes.

That's why someone in Chicago or Seattle experiences much bigger seasonal swings in daylight than someone in Miami.

And it explains why the clock change feels especially brutal in northern cities, where afternoons are already losing daylight rapidly.

But here's something even stranger.

The earliest sunset of the year doesn't actually happen on the shortest day.

Wait. The earliest sunset isn't on December 21?

Nope. And this is one of my favorite little astronomical surprises.

The winter solstice, December 21 this year, is the shortest day of the year in the Northern Hemisphere.

But in many American cities, the earliest sunset happens roughly one or two weeks before that.

For example, Chicago's earliest sunset arrives in early December, around 4:19 p.m. By the winter solstice, sunset is already a few minutes later.

How can that happen while the days are still getting shorter?

Because sunrise is also changing.

The timing of solar noon shifts slightly throughout the year due to Earth's tilted axis and its elliptical orbit around the Sun. That shifts sunrise and sunset together on our clocks.

For a while in December, sunsets begin getting later even as sunrises keep getting later faster.

The total daylight still decreases until the solstice.

So yes, your afternoons can start getting brighter before winter officially begins.

Mother Nature apparently enjoys making the calendar unnecessarily complicated.

Didn't Congress already vote to stop changing the clocks?

Yes, the House of Representatives voted in July 2026 to make daylight saving time permanent.

The legislation is called the Sunshine Protection Act, and it would keep most of the country on the summertime clock throughout the year.

That would eliminate the twice-yearly ritual of resetting clocks.

But there's a catch.

The bill passed the House and then stalled in the Senate. As of Halloween weekend, it has not become federal law.

President Trump has pushed for permanent daylight saving time, but lawmakers remain divided over the consequences.

Several states have already approved measures supporting permanent daylight saving time, but federal law currently prevents them from making that change independently.

States can choose permanent standard time, as Hawaii and most of Arizona have done. They cannot simply adopt permanent daylight saving time on their own.

So for now, most of us are still falling back Sunday morning.

And unless the law changes, we'll spring forward again on March 14, 2027.

Why is ending the clock change so controversial?

It turns out almost everyone can agree that changing clocks is annoying.

The disagreement begins when we ask which time should become permanent.

Supporters of permanent daylight saving time want more daylight in the afternoon and evening.

That means extra sunlight after work, more time for outdoor activities, and later winter sunsets.

But there's a trade-off.

Keeping daylight saving time throughout winter would also push sunrise an hour later on the clock.

In some northern locations, that could mean children heading to school before sunrise and commuters spending more of their mornings in darkness.

Sleep researchers have another perspective.

The American Academy of Sleep Medicine favors permanent standard time because morning light generally aligns better with our natural biological clocks.

So the argument isn't really about whether we should stop changing clocks.

It's about where we want the sunlight.

And unfortunately, Congress hasn't figured out how to pass a law giving everybody more of it.

Does everyone have to turn their clocks back?

No. And this is where the geography gets interesting.

Hawaii and most of Arizona stay on standard time throughout the year.

That means Phoenix won't experience Sunday's sudden one-hour sunset shift.

Its sunset changes from approximately 5:37 p.m. Saturday to 5:36 p.m. Sunday.

Meanwhile, Los Angeles goes from 6:01 p.m. to 5:00 p.m.

Same Sun. Same planet. Very different Sunday evening.

The Navajo Nation, including its territory in Arizona, does observe daylight saving time, adding one more wrinkle to the map.

And while we're talking about maps, there's another reason sunset times differ so much across the country.

Your position within your time zone matters, too.

Two communities at similar latitudes can have noticeably different sunset times simply because one is farther east or west within its time zone.

Apparently, even darkness has to deal with geography.

Is there anything good about Sunday's earlier sunset?

Absolutely.

For starters, the clock change brings sunrise about an hour earlier by the clock, which means more morning light.

And if you enjoy stargazing, the earlier evening darkness makes it easier to get outside and enjoy the night sky without staying up quite so late.

There are autumn constellations, planets, and plenty of celestial sights worth looking for, depending on the weather and your location.

Of course, the weather might have other plans.

And if you're one of those people who loves curling up with a blanket, a warm drink, and a good movie, congratulations.

Your season has officially arrived.

The pumpkins may be coming off the porch, but the long, dark evenings are just getting started.

So enjoy your Halloween candy Saturday night. Set your clocks back before bed if they don't update automatically.

And when Sunday afternoon suddenly starts looking suspiciously like evening, don't panic.

Nobody stole the Sun.

We just changed the clock.

The real mystery is why we keep doing it.

Nerdy Nugget: The shortest day doesn't have the earliest sunset

The winter solstice marks the year's shortest period of daylight in the Northern Hemisphere, but the earliest sunset generally arrives before it. That's because Earth's tilted axis and elliptical orbit cause solar noon to shift throughout the year.

So even before winter officially begins, your evening sunsets may already be getting later.

A little sunshine is hiding just around the corner.

Talk Weather To Me!

Love weather stories that make you say, “I never knew that!”?

Join the free Talk Weather To Me newsletter and get one fascinating weather or science story delivered to your inbox every morning in about two minutes. No hype. Just one great curiosity to start your day.

Subscribe free at WeatherNerdy.com/daily.