Why do we have Daylight Saving Time?

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You're listening to Brains On, but we're serious about being curious. Imagine you had a superpower. You can control time. You can speed up the day or slow it down at will. Maybe you decide to move time backward an hour in the morning. So you can squeeze in a few more dreams before school. Or just give over your dentist appointment. And it's kind of what we do with our clocks twice a year. You know? Forward, those are the times when we jump ahead or backward by one hour.

At least the clock jumps through time, even if we don't. Today. And on our bodies. Stay with us. Hey Gungador, how's the new job going? Very N C E O is big Even for big monster like Gangodore! Yeah, I've noticed that ever since we made you CEO of Brains on Universe, you haven't been at the dance studio as much. Yeah! Gangador! But Don't need to keep this place running!

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to sign up. Remember, good things exist when good So help us keep the lights on and help Gungador get back to what he lost. Sweating and twirling! Ba ba ba ba ba You're listening to Brains On from the Brains On Universe. I'm your host, Molly Bloom, and my co-host today is Ava from Minneapolis. Hi, Ava. Hey Molly. So we're gathered here today to answer this question. Hi, my name is Uzam from Kitchener and my question is why do we have DI saving signs?

So daylight saving time is part of the year here in North America when we move the clocks forward an hour. It also happens in lots of other places like Europe, Egypt, and parts of Australia. In fact, it's happening soon. Ava, I'm just wondering, does this change trip you up every year?

Um, not really. I kind of like having longer and shorter days. Yeah, you're like, Oh, this is like a fun adventure. Yeah, definitely. So in Minnesota, where we are, would you say it gets dark pretty early in the winter? Yeah, I'd say so, definitely. Yeah. It's uh always a bummer when it's like four thirty and I'm like the sun is Yeah, that part's not so great. So what do you prefer? Getting up early and getting the morning light or staying up late?

I like both, but if I'd have to choose I would say staying up late. Yeah, you're a night owl? Yeah. So if you could choose to jump forward one hour every year, what hour would you like to skip over? I would skip four to five because that's my bus ride and it's really long and it gives me a headache. Oh, okay. So That sounds like a really good one to skip. Yeah. Good choice. So if you could go back one hour, repeat an hour, when would you use that power? Um, I think I would go back

an hour at seven o'clock so I could have more sleep before going to school. Very smart. So you're like one more hour of sleep, please. Mm. By the way, you might have noticed we're saying daylight saving and not daylight savings. There's no S. Kind of tricky. I learned that when we started making this episode. But to Ozam's question Why do we have daylight saving time? You think based on the name

The idea is to save daylight, but you can't actually save daylight. Like put it in a jar and keep it for later or store it in the sun bank? Yeah, that's not gonna work. Nope. Sunlight each day no matter what. We are not in control of that. But we are in control of our clocks and our routines. Like when we wake up, when we start. And work or school. And when we go to bed. Good night, Ava. Good night, Dad.

All would be well and good for our schedules if the sun rose and set at the same time every day. Yeah, but it doesn't work that way. No, sir, it does not. Here in North America there is more daylight in the summer and less light in the winter. We move the clocks forward in the spring so there is more light in the evenings, which also means there is less light in the mornings. But why are the days so much shorter in the winter anyway?

Molly, Ava! I'm a time traveler from the present, here to help answer your question. Hey Sandin, um why are you wearing that shiny outfit covered in bubble wrap? Yeah, I'm a time traveler from the present. Wait, if you were from the present, doesn't that mean you're from right now? How is that time traveling? And it still doesn't explain the outfit. Are those swim flippers on your feet? Okay, okay. I haven't traveled in time yet, but I plan to very soon.

On Daylight Saving Day, I, Sandin time Traveling Totten, will boldly go one hour into the future. I'm wearing this bubble wrap and tinfoil cardigan with the flipper shoes because my trend forecast say this is how people will be dressing in the future. You mean one hour into the future? Precisely. Molly, it's gonna be like a whole new world, and I need to blend in. Now, I've been studying this miraculous time jump for weeks.

So I can help explain anything about it. Actually, we were just wondering. We changed the clocks in late winter to get more light in the evening. But why is there so much less daylight in the winter anyway? Great question. It actually has to do with how our planet tilts. Think of it this way. Uh imagine our planet is a golf ball. And imagine that golf ball is going in circles around a giant light bulb. That's the sun. Okay, I am imagining it.

Circling a big light. Great, great. Okay, now not only is the golf ball making a big circle around that light, imagine that it's also. So it's making little twists. While it makes one I'm getting dizzy thinking about it, but okay. Okay, so each time spins around one time like a top, that's one day. Each time it goes all the way around that big light. Makes sense? was facing the light. The amount of daylight

same all year. But our Earth is not facing the sun straight on. It's tilted a little. So imagine you took that golf ball and you tilted it a little bit. So the top half was more in the light than the lower half. Okay. That top half would be seeing a lot more sun then, right? Exactly. That's what it's like for us in the northern part of the globe when it's summer. We're on the top half of that golf ball, and we're tilting more towards the sunlight, and our days are long. And I'm guessing

The bottom half of the golf ball, the part tilting away from the sun, that's winter. 100% spot on. When it's summer in the northern half of the planet, it's winter in the southern half. But here's the thing. As the Earth circles around the sun, it'll eventually get to the opposite side of that star. stays the same, but now the southern part is angled to the sun and the northern half is angled away. Oh, so that's winter for us in the north. And summer in the south. Correct.

And if you live right along the middle of the planet, like the belt we call the equator, the length of the days doesn't change all that much in the summer or the winter. But when you live really far north or Really far south, you can get extremely short days in the winter and very long ones in the summer.

So that's why we have short days in the winter. Because right now, our half of the globe is tilted away from the light. And so we aren't getting as much direct sunlight. Wow. Thanks for shining a light on that issue for us, Sandin. No problem. Now I have to get ready for our leap forward in time. You should too. Here, eat this. It's a cereal full of riboflavin. I've heard riboflavin helps your body adjust to time travel.

Mmm, I can really taste the ribo flav then. Enjoy. Now, I'll see you two in the future.

Um No matter what the clock says, I always know when it's time for the Ava, are you ready for the mystery sound? Yes I am ready. Okay, here it is. What do you think? I think that that's maybe like a fork or a knife hitting a bowl with some water in it maybe. Mm-hmm. Like something cleaning it in the sink. Okay. Um but yeah, I think maybe like a fork

Like hitting a glass bowl and then also there's some water in it. Okay, so we're hearing a utensil. We're hearing a liquid. We're hearing a bowl. Do you wanna hear it again? Yes. Okay, here it is. Thank you. Not really, maybe like Two utensils clinking against each other. Um, but honestly I think I have the same thought. Yeah. Yeah. I that sounds very convincing to me. Yeah. Th first thing that popped to my mind was like a spoon and a cup.

Yeah. That's what was in my head. So I think you and I are doing a great job. Yeah. All right. So we're going to hear it again, get another chance to guess and hear the answer at the end of the show. Stick around. We've got an episode coming up about baseball. It's a fun sport with lots of fun chants. Like Nice, but you know what doesn't have great Science. It sure could use some. So make a

Fun game day chant for science and share it with us. Ava, can you think of a fun cheer or chant for science? So I my dad thought of one that's a big thing. Okay, okay. Excellent. Thanks Dad. It's really funny. Okay. Give me a why. Why? Give me a why. Why? If you're so curious, ask a scientist. Bravo. I love that one. It also encourages arm motions to make a Y, wouldn't you say? I can see a whole stadium doing that. I am into it. Excellent.

So record your cheer or chant and send it to us at brainson.org slash contact. You can also send us drawings. Again, that's brainzon.org slash contact. Can't wait to hear from ya.

This is Brains On. I'm Molly. And I'm Ava. And we're talking about daylight saving. It's something a lot of you are curious about. Hi, my name is Catherine from Richmond Hill, Ontario. And my question is, who invented daylight savings and why do we have daylight savings? Hi, my name is Micah from Queens, New York. My question is why do we have daylight savings in the USA?

So we know that in the winter days are shorter in the north because our half of the planet is tilted away from the sun. But why do we start moving the clocks forward? Turns out, lots of people have suggested changing clocks to make up for shorter days. In fact, in ancient Rome, they just changed the length of the hours to better fit the daylight. So an hour was longer in the summer and shorter in the winter.

But moving the clock forward by an hour didn't take hold until much later, during World War I. It was the early nineteenths. And there was a big battle across the globe. Lots of countries were fighting. To save energy for the war, some places moved the clocks forward an hour. That way there would be more daylight in the afternoon and evening. The idea was that people would use less energy powering homes if they could just rely on daylight instead.

The war ended, but daylight saving caught on in the US and was made into law a few decades later in the 1960s. Now we still switch the clocks forward every spring to get more light after school and work. These days, changing the clock doesn't even save much energy. But we still do it. There's a lot more to the history of this time change, and we're gonna cover it in an episode of Forever Ago later this year, but we want to know if you could do anything you wanted with an extra hour of daylight

What would you do, Ava? What would you do with that extra hour of daylight? Well, there's a lot of things I'd wanna do but I think I would wanna go over to my friend's house and play on a trampoline for an hour. Nice. It's really fun. That sounds great. That's a perfect use of that hour. So listeners, send us what you plan to do with your extra hour of evening light. Send it to us at brainson.org slash contact. Thanks. Brains Okay, time now for some quick clock facts.

You might have heard that one of the reasons we do daylight saving is to make things easier for farmers. But that's not true. Farmers actually were against the time change. They said it really only helps city workers. In fact, one saucy person wrote into a popular magazine to say The farmer objects to doing his early chores in the dark. Merely so that his city brother, who is sound asleep at the time, may enjoy a daylight motor ride at eight in the evening.

There are some places that don't do daylight saving. Yeah, like China and India. In the US, Hawaii and parts of Arizona don't observe the change either. But the Navajo Nation in Arizona does. Daylight saving used to stop on the last Sunday of October, but candy makers helped get it changed to November. That way it would still be daylight saving time on Halloween.

More daylight equals more time for kids to reek in that sweet Halloween candy. It also means that kids would be safer on the streets since it would be lighter longer. Speaking of clocks, mine says it's time to check the mailbag. We love getting letters, emails, and messages from you all. Okay. Oh, here's one. Someone made their own version of our theme song. Let's hear it. Hi Brainzone, I am Elliot from Greenbrook, New Jersey and this is the best that I could do of the Brainstorm theme song.

Oof, nice on a keyboard and everything. Nice work, Elliot. If you want to play us a song or ask us for some advice, or if you have a joke to share, send it to us at brainzon.org slash contact. Hope to see your name in our next mailbag. Brainson is independent, meaning we only exist because people support us. You can get all our episodes without ads and keep us going by joining SmartyPass. Go to smartypass.org to sign up and make a difference. Thanks.

Welcome back. Ava and I are learning all about daylight saving. It doesn't actually say daylight, but moving the clocks forward makes it so that there's more daylight in the evenings. Can I just say I utterly detest daylight saving with every single one of my precious neurons? Ugh Oh hey, it's Duane the brain A literal brain that can talk. Yes, it's me. I'm a brain and I'm still absolutely wonderful, but I am not looking forward to daylight saving time. Every year it messes me up.

Because you get confused about the time? Me too. I can never reset my car clock, so I just leave it wrong until we change time back. True story. Sure. But for me it's not the time on the clock. It's my circadian rhythm. いけとー!アックドードル! Oh, circadian rhythm. That's like a person's internal clock that tells them when to wake up and when to go to sleep. Exactly. And it's controlled by daylight. When your eyes see the morning rays of sunshine, that internal clock is like, Wake up, buddy boy.

Time to rise and shine the day away. Right. And when it gets dark, that internal clock tells your body to get tired and sleepy. So you can rest. Yep, so when we jump an hour in the morning My circadian clock is all egg what the beans? I'm supposed to wake up and now it's too early. Ugh And when it's evening my clock is all like, yo, I'm ready to get cozy in my jammies. Why are we still eating dinner?

I feel that too. Waking up the day after the jump is hard. Yeah, bro. Some sleep researchers say insomnia is more common after clock changes. Boo that! And some other scientists have found links between moving the clock and heart problems in older people. And more car accidents too. That makes sense. We're not as sharp when we're groggy. Yeah, daylight saving is low-key terrible for our health.

That's why I'm boycotting it, not changing my clock. Maybe I'll be late to appointments or early. Whatever. I don't care. But scientists also say the effects of daylight saving only last a few days. And in the fall you get a little extra sleep, which is nice. Also, what kind of appointments does a talking brain even have? Important stuff! You know how Gungador is CEO of Brains On Universe now? Well, I'm Gungador's Brain Trust.

Does that mean you advise Gungador on important business stuff? Nah. I mean I'm a brain he truck. So we just tell each other secrets that we'll never share with anyone, like how Sandin is afraid of green apples, or how Mark sometimes sneaks off to be the backup catcher for the New York Mets. Top secrets though. Well, good luck with everything. Thanks for stopping by, Duane. Later, broskies.

Daylight saving happens in the US when we move clocks forward an hour in the spring. The goal is to get more sunlight in the evening hours, but it also means less light in the morning. It started as a way to save energy during World War I, but it became a normal part of life in certain places like the US. Moving the clocks can mess with our internal body clocks.

Called our circadian rhythm. But the effects wear off after a week or two. That's it for this episode of Brains On. This episode was produced by Molly Blue, Mark Sanchez, and Santa Taunton. It was sound designed by Mark Sanchez, who also wrote our theme music. Special thanks to Sam and Jen Rosenbaum, also Ava's sister, and the rest of her family, and Ken Taborski at Code of the North for all of their website help. Okay, Ava, you ready to go back to the mystery sound? Yes. Alright, let's hear it.

Yeah, I think like maybe a spoon scooping or like getting scooping like maybe water out of a bowl into like another bowl or like the sink maybe. I don't know. Something with silverware and a bowl and water. Silverware and a bowl and water. Yeah, that's what I'm with you. I I w Okay, I'm just gonna go out on a limb. I'm gonna say spoon. What do you think? Spoon, knife, fork, spoon? We're going spoon. Okay.

Okay. Spoon, I'm committing to spoon. Should we hear for right? Yeah. Okay. Okay. Here is the answer. Hi Buenzon, my name is Kelso. That was the sound of me mixing tea in a teacup with a spoon. Yes. Spoon. Spoon. Spoon. Spoon. Okay. We didn't quite get the teacup part. But a teacup is like a tiny bowl. It's a cup. It's a cup. And there's liquid in it. Good job, Uz. High fives.

Now it's time for the brain's honor roll. These are the incredible kids who keep the show going with their questions, ideas, mystery sounds, drawings, and high fives. Ming Yu from West Windsor, New Jersey, Phoebe and Deacon from Austin, Texas, Henry from Westerfil, Ohio, Eliana from Toronto, Annie from Providence, Rhode Island, Ethan from Birmingham, Alabama, Mason from Australia, Howell from Fairbanks, Alaska.

Wesley from Lincolnshire, Illinois, Beckett from Davenport, Iowa, Kai from Toronto, Abigail from Roseville, California, Colin from St. Louis, Aubrey and Noah from Grand Rapids, Michigan, Xandrew from the Philippines.

Maggie from Coming, Georgia, Sally from Gainesville, Georgia, Freddie and Alice from Seattle, Melody from Buena Vista, Colorado, Hadley from Lenoir City, Tennessee, Penny from New Jersey, Logan from Waterloo, Ontario, Charlie, Veda, Parker, Finley, and Callum from Parksville, British Columbia, Nora from Aldi, Virginia.

Maton from Chevy Chase, Maryland, Merlin and Mavis from Albuquerque, New Mexico, Jaden from Sanford, Florida, Ezra from Huntington Beach, California, Maddie from Massachusetts, Samuel and Abraham from Chula Vista, California, Henrik from North Carolina, Virgil from Los Angeles, Catherine from Belmont, Massachusetts, Jojo from the California.

Joe from Chicago, Harper and Hendrick from Oshkosh, Wisconsin, Sanvi from Prosper, Texas, Martha from Charlotte, North Carolina, Ina's from Camden, Maine, Yalvani from Leonberg, Germany, Juniper and Genevieve from Bloomington, Indiana, Robin from Swansboro, North Carolina, Aisha and Amrita from San Jose.

Say Costa Rica, Althea from Wakefield, United Kingdom, Emma from Basil, Switzerland, Olin and Solvi from Warren, Minnesota, Kieran from Berkeley, California, Hattie from Westminster, Colorado, Calder and Corley from Silver Spring, Maryland, Tate from Mullen, Nebraska, Cameron from Selbyville, Delaware, Annelle from the California.

Stansbury Park, Utah, Aiden from Cupertino, California, Grace from Lexington, South Carolina, Elise from Del Mar, California, Brody from Virginia, Alina and Clara from Burke, Virginia, Molly from Virginia, Luca from Darlington, United Kingdom, and Scarlett from Austria. We'll be back next week with a mystery sound extravaganza. Thanks for listening.