National Smile Day: The Joyful History of Irresistible Grins

Observed on: May 31st
national smile day
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Get ready to flash those pearly whites, because National Smile Day is here to brighten up your calendar—and your face. Celebrated every year on May 31st, this irresistibly cheerful holiday exists solely to remind us all of the simple, contagious power of a smile. It’s like the human version of turning the sun on. Whether you’re grinning from ear to ear or just curling up the corners of your lips, National Smile Day is proof that joy can be both visible and viral—in a good way.

A Brief History of National Smile Day

Before we had a holiday devoted to smiling, people smiled anyway (shocking, I know). Cavemen likely smiled when they discovered fire or when the other guy got hit with a falling coconut. But formal recognition of National Smile Day didn’t come until much later, and no—it wasn’t invented by a toothpaste company, although they certainly took advantage.

The holiday was actually created by two passionate smile enthusiasts: Dr. Tim Stirneman and Jim Wojdyla of Compassionate Dental Care in Lake in the Hills, Illinois. Yes, a dentist helped start this day, proving that even the people who give you root canals know the value of a good grin. They believed that smiles have healing power, both physically and emotionally. And considering that a single smile can lower your stress levels, boost your immune system, and make you more attractive (scientifically speaking, not just your mom saying it), they were definitely onto something.

The Science of Smiling (Yes, It’s Real)

Let’s get nerdy for a moment. Smiling isn’t just an involuntary response to dad jokes and puppy videos. It’s a biological superpower. When you smile, your brain releases dopamine, endorphins, and serotonin. That’s the Holy Trinity of Happy Chemicals™. It’s like getting a dose of emotional espresso—without the crash.

Even better, your body doesn’t actually care if the smile is real or fake. Go ahead, try a fake smile right now. Boom—your brain just got a little dose of feel-good hormones. That’s why National Smile Day encourages everyone to smile at others, even strangers. You could be the reason someone else turns their day around, which is way more satisfying than arguing with people on the internet.

From Mona Lisa to Emoji

Smiling has always had its place in the cultural spotlight. Just look at the Mona Lisa—that mysterious smirk has baffled art historians and conspiracy theorists alike. Is she happy? Sad? Secretly judging you for skipping leg day?

Fast-forward to today, and we’ve got the smiley face emoji 😊 ruling our digital expressions. Thanks to the rise of texting, social media, and endless group chats with cousins you barely know, smile icons now do the heavy lifting in emotional communication. And yes, we even have an emoji for smiling through the pain 😬—modern art, folks.

We can’t forget the iconic yellow smiley face from the 1960s. Designed by Harvey Ball, it became the international symbol for positivity—and eventually, the accidental mascot of rave culture. Who knew smiley faces would someday adorn everything from office emails to glow sticks at EDM festivals?

How to Celebrate National Smile Day (Without Overthinking It)

There are many ways to honor National Smile Day, and thankfully, none of them involve baking anything or gluing sequins to your pet.

  1. Smile at a stranger. Try not to look like a maniac, but a friendly grin goes a long way.
  2. Tell a cheesy joke. Like: Why did the scarecrow win an award? Because he was outstanding in his field.
  3. Call someone you love. Hearing your voice could make them smile, especially if you don’t ask for money.
  4. Post a smiling selfie. Hashtag it with #NationalSmileDay and give the internet what it really needs—more joy and fewer political rants.
  5. Eat your favorite food. Smiles come naturally when tacos are involved.

The Ultimate Power of National Smile Day

In a world where doomscrolling has become a sport and existential dread is as common as Wi-Fi, National Smile Day reminds us to stop, breathe, and curve those lips upward. It’s a simple act with extraordinary ripple effects. You don’t need a reason to smile—you just need a moment. And on May 31st, the whole world gives you permission to indulge in that moment.

So go ahead: smile like you just found a French fry at the bottom of the bag.

Why National Smile Day Matters More Than Ever

National Smile Day is not just a feel-good moment—it’s a global invitation to connect, uplift, and live a little lighter. A single smile can spark a chain reaction of joy, and in today’s fast-paced, notification-buzzing world, that’s not just nice—it’s necessary. So this May 31st, be the reason someone smiles. Or better yet, be the reason you smile. After all, you’ve got 43 muscles in your face—might as well put them to good use.

And remember: a smile is the only curve that can set everything straight.

View more National Celebration Days in May

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