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National Megalodon Day - June 15


On the 15th of June, National Megalodon Day teaches us about the most massive shark that ever lived!

The Megalodon swam the Earth’s oceans for 20 million years during the Cenozoic Era. Their mouths spanned 8 to 11 feet wide and were filled with rows of sharp teeth. With a bite force of over 40,000 pounds per square inch, a maximum weight of over 60 tons, and serrated teeth measuring near 7 inches, their prey did not stand a chance.

Megalodon’s dentition consisted of 276 serrated teeth.
They also had up to 6 rows of teeth called files.

Megalodon ruled their watery habitats, eating large marine vertebrates. The phosphate deposits currently mined near Aurora, North Carolina (also known as Lee Creek), produce some of the finest and well-preserved examples of fossilized Megalodon teeth in the world. Numerous other Miocene and Pliocene aged fossils, including the whales Megalodon hunted, are also found along with the Megalodon’s magnificent teeth.

Dentition describes the typical arrangement, development, number, and kind of teeth in a species’ mouth at any given age.
Teeth help identify a fossil and are of particular interest where the Megalodon is concerned.

Megalodon’s Extinction

At the end of their era, the Megalodon grew to enormous sizes and dominated the oceans. Food was likely plentiful. As the Ice Age came, however, competition for survival may have become fierce. Their prey began to dwindle, and other species, like carnivorous whales, put up a good fight. It is also possible that the rise of its rival, the modern-day Great White Shark, was the catalyst for Megalodon’s extinction. Due to Megalodon’s large size, it could have been out-competed by the smaller, faster Great White Shark.

Based on tooth size, the Megalodon Shark grew to 60 feet in length which is longer than a school bus!

The Megalodon disappeared from the fossil record near the end of the Pliocene Epoch (some 3.6 to 2.58 million years ago), and when it did, amazing things began to happen. The fossil record and modern history show that whales and other sea animals grew larger. Without the mega predator, perhaps favorable conditions permitted survival long enough to thrive and grow to their larger sizes.

What does all this mean for today’s sea life? Will another predator grow to dominate the seas? Or has the Megalodon’s time come and gone, leaving behind only a fossil record for us to explore? Celebrate and explore National Megalodon Day to learn more!

HOW TO OBSERVE #NationalMegalodonDay

National Megalodon Day encourages you to learn more about the “All-Time Alpha of Apex Predators” by visiting fossil and dinosaur museums near you, especially ones like the Aurora Fossil Museum in Aurora, North Carolina. Other ways to learn more include:

  • Take a trip to visit the Aurora Fossil Museum and Dig the Past in the museum’s Fossil Park.
  • If you live in North Carolina, sign up to get the AFM license plate.
  • Engage with the Aurora Fossil Museum by liking their social media pages.
  • View the AFM’s website ( for more information on the museum and the North Carolina State Fossil, Megalodon.
  • Read books or watch a documentary about the Megalodon.
  • Discover paleontology and the science behind fossils.

Share your celebrations by using #NationalMegalodonDay on social media.


Aurora Fossil Museum -Logo

Aurora Fossil Museum – Aurora, North Carolina, USA –

The 15th of June is designated as National Megalodon Day to honor the day that the Aurora Fossil Museum (AFM) first opened to the public, the 15th of June, 1978.

The Aurora Fossil Museum is a 501(c)(3) nonprofit science museum and education resource center whose mission is to educate the public about paleontology in an engaging manner while emphasizing the natural and cultural history of Eastern North Carolina. The AFM educates the public through exhibits, interactive inquiry-based activities, outreach programs, summer camps, events, field studies, and the Aurora Fossil Festival. The main museum houses a wide variety of Miocene and Pliocene fossils discovered in the neighboring phosphate mine, including some of the best Megalodon teeth in the world! The Megalodon is also the ‘Flagship Fossil’ of the AFM, as the mighty Megalodon Shark’s fossilized tooth adorns the museum’s logo!

Dr. Bruce Worf, a longtime supporter of the AFM, with the help of Senator Bill Cook, spearheaded the effort to get the North Carolina Legislature to designate the Aurora Fossil Museum as a North Carolina State Attraction and enact a state attraction license plate featuring the AFM logo, a Megalodon shark tooth. AFM Executive Director Cynthia Crane, with the support of the Aurora Fossil Museum Foundation, Inc. Board of Directors, and Dr. Bruce Worf felt that the 15th of June would be the perfect day to celebrate the Aurora Fossil Museum with the designation of National Megalodon Day.

The Registrar at National Day Calendar proclaimed the first National Megalodon Day on June 15, 2021.



On June 15th each year, National Smile Power Day shares one powerful expression.  

From the good morning greeting and the first “How may I help you?” present yourself with a smile. No matter where you are employed, job seeking, retired, or looking for new horizons starting the day with a smile is certainly more empowering than a pout or grump. Starting with a smile first is easier than trying to get there later in the day. 

When you smile at someone, you are telling them that they are valued and worth the smile that you just gave them. Smiles are morale boosters and confidence builders.

Research has proven that smiling really does increase attractiveness and likability between humans. Smiling creates greater trust and increased interpersonal cooperation. Smiling at someone can help them to relax and relieve their stress while at the same time, it will make you feel at ease, too. Even if you do not feel like it, smiling will lift your mood and can make you a happier person.


Challenge yourself to smile more often today. Use a smile to disarm a tense situation, or simply smile during your daily tasks. Are you having trouble smiling?

Tips to Help You Smile
  • Think of a few happy moments that automatically generate a smile for you. You know, those moments where you belly laughed until your stomach hurts or a time when you were so pleased with yourself your face hurt from smiling. Keep those memories handy and use them to help you smile more often.
  • Save a couple of short jokes that are just so silly you can’t help but smile. Tell them to others, too. The best ones are simple children’s jokes or riddles that play on words. 
  • Learn Spoonerisms. This fun way of swapping letters in two words in a phrase to make new words make people stop and think. And then they smile and so will you! An example of a Spoonerism is instead of ordering peas and carrots at a restaurant you say, “I’ll have the keys and parrots.”
  • Make a list of the things you’re grateful for. Which ones make you smile? Keep the list handy and refer to it often. Add to it and feel your smiles add up. 

Use #SmilePowerDay on social media.

Families and educators, visit the National Day Calendar Classroom to discover projects and ideas that will help you Celebrate Every Day!


National Day Calendar is researching the history of this happily powerful day. While we do, we invite you to explore these other joyful days:

  • Summersgiving
  • National Play Catch Week
  • International Drop A Rock Day
  • International Clown Week
  • Happiness Month
  • International Top Spinning Day
  • National JoyGerm Day
  • Hunt For Happiness Week
  • National Smile Day



    The North American Nature Photography Association (NANPA) along with millions of photographers and photography lovers across the nation observe Nature Photography Day on June 15th. Nature lovers and photographers alike celebrate this day with enthusiasm. They capture the breath-taking beauty all around us and encourage others to see the wonders of our natural Earth.

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    Whether they take photos of wildlife, landscapes or both, the do so with a sense of awe. It’s in the spirit of preservation of these wonders that NANPA created the celebration. Every image that inspires us to care for our surroundings and preserve it for future generations celebrates the day.

    HOW TO OBSERVE #NaturePhotographyDay

    Explore the world around you. Use your dedicated camera and/or the camera on your phone to take some photos of nature. Places to celebrate the day include:

    • Taking a guided tour through a local preserve.
    • Visiting a botanical garden.
    • Going bird watching.
    • Visiting a national park.
    • Watching a sunset or sunrise.
    • Visiting a lake, river, or the ocean.

    For those looking for photography tips, look no further. We have 13 ways to Get the Most From Your Digital Camera. What’s your favorite place for nature photography? Let us know using #NaturePhotographyDay in social media.

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    NANPA designated the observance in 2009 to promote the enjoyment of nature photography. The calendar also includes these photography celebrations:

On Deck for June 16, 2021

National Days

International Days

Recipe of the Day

Name: Zucchini Slaw
Prep: 10 minutes
Total Prep: 10 minutes + 1 hour chill 


2 small or 1 medium zucchini, coarsely shredded and well-drained
1/4 cup finely chopped onion
1 cup coarsely shredded carrot

3 TBSP mayo
1 TBSP apple cider vinegar
1/2 TSP sugar
1/4 TSP salt & pepper to taste.


Mix dressing ingredients toss in veggies. Cover & refrigerate for at least 1 hour. Serve.

Inspiration: Anne Knight

June 15th Celebrated (and Not So Celebrated) History


The former slave, Henry Ossian Flipper became the first African American to graduate from West Point. He entered the U.S. Military Academy in 1873 after attending Atlanta University.


Bessie Coleman became the first woman pilot of African-American and first pilot of Native-American descent. Since no flight schools in the United States would admit her, she traveled to France in 1920. There Coleman earned her pilot’s license on June 15, 1921. Once she obtained her license, Coleman turned to barnstorming to make a living. Once again, she turned to Europe to learn the skills for exhibition flying. Through the years, she earned the nickname “Queen Bess” at events for her flamboyant style. Coleman died tragically as a passenger at the age of 34 when she was thrown from a plane after the pilot lost control.


Twenty-two years after President Calvin Coolidge signed the bill providing for the creation of the Great Smoky Mountain National Park, Congress authorized the boundaries and construction of facilities for the park. Even before the park’s completion six years later, visitors from all over the country began flocking to see its marvelous sights.


The first successful tightrope walk directly over Niagara Falls is completed. American Nikolas Wallenda completed the feat, adding it to his growing list of acrobatic and aerial feats.

June 15th Celebrated (and Not So Celebrated) Birthdays

Fred Balzar – 1880

Business leader and lawman, Fred Balzar also served as state senator and assessor before being elected Governor of Nevada.

Don McGregor – 1945

Comic book writer, Don McGregor, brought a thrilling new series to the Marvel family through Black Panther. Interestingly, he started off as a proofreader who challenged the editorial staff for a better concept. The challenge was returned, leaving McGregor with the task of turning the project into a creative success.

Jack Horner – 1946

Noted paleontologist, Jack Horner, has made several contributions to the paleontological community. From the discovery of new dinosaurs and their behaviors to publishing numerous articles, books, and children’s books.

Ice Cube – 1969

Born O’Shea Jackson, the American rapper and filmmaker helped bring gangsta rap to the mainstream with his album Straight Outta Compton.

About National Day Calendar

National Day Calendar® is the authoritative source for fun, unusual and unique National Days! Since our humble beginnings on National Popcorn Day in 2013, we now track nearly 1,500 National Days, National Weeks and National Months. In addition, our research team continues to uncover the origins of existing National Days as well as discover new, exciting days for everyone to celebrate.

There’s a celebration for everyone. While National Road Trip Day satisfies the itch to wander, many pet days let us share our love of animals. National 3-D Day and National Astronaut Day honor the advancement of technology, too. Every food day you can imagine (National Avocado Day, for example), will keep you celebrating, also!

Be sure to stay in the know by signing up for our e-mail updates. Also, follow us on Facebook, Twitter, and Instagram

Our Ambassador Program is another way #CelebrateEveryDay®! Whether you become an ambassador or follow one of the savvy ambassadors, their fun videos and posts will keep you prepared for every holiday.

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