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On August 31st, National Diatomaceous Earth Day recognizes the diatom and the remarkable mineral it creates.

Most people know of diatomaceous earth because they use it around their homes. Sometimes they use it as a filter for swimming pools or as a natural insecticide. Biologists understand diatoms, single-celled plants. They form diatomaceous earth and are indeed the lungs of the earth. Amazingly, diatoms produce about ¾ of the world’s new oxygen supply. Another scientist known as materials scientists recognizes diatom skeletons (called frustules). Imagine tiny, intricate porous opal structures. They are known to be the most durable naturally occurring substances in the world.

About Diatomaceous Earth

Diatomaceous earth, also known as DE, is a sedimentary rock. DE mines unearth large deposits worldwide. From the United States, Mexico, Chile, and Peru to France, Spain, Denmark, and China substantial deposits exist. While dying diatoms continue to form diatomaceous earth today, some of the deposits developed millions of years ago.

When diatoms die and fall to the bottom of bodies of water, DE deposits form. Over time, the organic portions of the diatoms weather away. The remaining opal frustules form diatomaceous earth. Some of the largest deposits in the U.S. formed in ancient lakes in California, Nevada, Oregon, and Washington. They also formed in oceans and occur along the coasts of North and South America.

Around 1836, Peter Kasten discovered DE in Germany. At the time, he noted some of DE’s amazing qualities. Its astonishing ability to absorb, filtrate, polish, and stabilize makes DE desirable in numerous industries. Long before Kasten’s discovery, though, the world was using diatomaceous earth. Ancient Greeks used it as an abrasive as well as a building material in lightweight bricks. Even in pre-historic times, diatomite was used in the ice-age cave paintings in France.

Modern Applications

Today, DE is one of the most useful and durable substances known. DE sees nearly universal use in the filtration of liquids. For example, DE filters the beer and wine we drink. It also filters the water in swimming pools. DE refines chemicals for food and medications. Another DE use is in paint; it removes the sheen making flat paint flat. In plastics, DE prevents blocking in plastic film. Additionally, when oil spills, recovery specialists often turn to DE to absorb the oil.

And there are hundreds of other applications for DE with many more yet to be discovered!

HOW TO OBSERVE #DiatomaceousEarthDay

Explore the uses of Diatomaceous Earth. Where do you think it might be used around your home or work? Discover more about diatomaceous earth and use #DiatomaceousEarthDay to share on social media.


EP Minerals founded National Diatomaceous Earth Day to celebrate this fascinating naturally bio-engineered material, and the Registrar at National Day Calendar approved the day in 2016.



On August 31st, National Matchmaker Day honors romantics whose dauntless pursuit of perfect purchase for cupid’s arrow results in lasting love stories.

Playing matchmaker requires a bit of social savvy. It also requires the ability to listen and timing. They know each friends’ habits (good and bad), passions, and hobbies. When there is a spark, even when the prospective couple is painfully unaware, the matchmaker knows.

While a matchmaker isn’t always successful, her (or his) heart is certainly in the right place! It is all about love, after all. Even the success stories can be quite entertaining. And National Matchmaker Day celebrates them all. Awkward blind dates. Miscommunications. And yes, even the complete mismatches. The celebration raises a toast to the people who bring lovers together.

HOW TO OBSERVE #NationalMatchmakerDay

Honor those special matchmakers who work to bring couples together. Some of the best ways to celebrate the day include:

  • Send your matchmaker a thank you note.
  • Give them a shout-out on social media.
  • Take out the photo album and relive the memories.

Most importantly, share your matchmaker story!

Use #NationalMatchmakerDay #ArtCarvedBridal #ShareYourStory to share on social media






ArtCarved Bridal submitted National Matchmaker Day to celebrate and thank all the matchmakers who bring two people together in love and happiness.  The Registrar at National Day Calendar approved the day in 2016.

About ArtCarved Bridal

With an unparalleled commitment to artisanship, expertise, and authenticity since 1850, ArtCarved maintains its rich heritage of hand-craftsmanship. Now the style combines an on-trend and contemporary design aesthetic. ArtCarved offers a wide range of customizable fine jewelry – classic, vintage and contemporary – something unique for everyone.

ArtCarved designs elegant, high-quality engagement rings and wedding bands one can wear every day, forever. The brand celebrates the way you live and love. That includes the big moments to the small moments and all of the moments in between. ArtCarved is a division of Frederick Goldman Inc., along with their other leading brands TRITON and DIANA.

National Eat Outside Day - August 31


Friends, fresh air, and good food are the focus of National Eat Outside Day every year on August 31. Whether at home, a park, a favorite restaurant or food truck, or the beach, food just tastes better when we eat it under the open sky.

Many foods lend themselves to eating outdoors but sometimes it’s as simple as taking your prepared plate out to the balcony, porch, or patio. Also known as al fresco dining, many restaurants offer patio seating so their patrons can enjoy their meals while taking in the city, beach, countryside or just people watch. Even more temperate climates offer seasonal outdoor dining.

Eat Outside Day encourages you to taste the sunshine (or the moonlight) while eating your meal. It’s like a mini stay-cation where you get to recharge while enjoying a delicious feast outdoors.

HOW TO OBSERVE National Eat Outside Day

National Eat Outside Day offers limitless possibilities to celebrate! Try these ideas:

  • Host an outdoor brunch or just take your bacon and eggs outside to enjoy.
  • Take your sack lunch outside to eat during your break.
  • Pack a picnic basket and head to the park.
  • Visit your favorite restaurant and sit on the patio this time.
  • Invite friends over for a BBQ.
  • Take a dinner river cruise.
  • Pack some sandwiches and trail mix and go for a hike.
  • Stay up late, pop some popcorn, make cheese and crackers or grab the leftovers. Spread a blanket under the stars and look for constellations while snacking.
  • Organize an outdoor potluck.
  • Host your book club outdoors with all your favorite foods and beverages.
  • Go camping. You’re nearly guaranteed to eat outdoors when you’re in the Great Outdoors.
  • Take a cue from your garden. Wash off those ripening vegetables and fruits with a spritz from the hose and savor your bounty.

And don’t forget to check out the National Day Calendar Recipes pages for many delicious ideas. Use #NationalEatOutdoorsDay to share your celebration on social media.

National Eat Outside Day History

National Eat Outdoors Day has been observed since at least 2006. However, we were unable to identify the source of the observance.

Eat Outside FAQ

Q. What does “al fresco” mean?
A. It means “in the air” and typically is used to reference outdoor dining.

Q. Is outdoor dining a new fad?
A. Not really. Humans have been eating outdoors for centuries. Sometimes out of necessity (caves, huts, teepees, covered wagons don’t always have a lot of space for indoor eating).

Q. What are some of the best foods to eat outdoors?
A. Just about anything can be eaten outdoors depending on the setting. However, some foods are better than others when it comes to portability and convenience. Sandwiches, finger foods, fresh fruits and vegetables all fit the picnic profile. When we’re cooking at home, nearly anything can be on the menu – including soup.

In 2017, National Day Calendar® began celebrating each state (including National South Carolina Day) in the order they entered the union, starting the week of Independence Day and ending with Hawaii. We highlight a small part of each states’ history, foods, and the people who make up the state. Many states have their own state celebrations, and National Day Calendar’s observances do not replace them. There’s so much more to explore; we can’t help but celebrate our beautiful country even more!



On August 31, National South Carolina Day recognizes The Palmetto State and her unique landscapes, bold personalities, and long history.

Catawbas and Cherokee were some of the first to greet Spanish and French explorers in the 16th century. Their tribes dotted the land with villages. The Englished established the first successful settlement near present-day Charleston. Named Carolina initially after King Charles I, the colony later split into North and South Carolina in 1710. Following in the footsteps of the previous colonies, South Carolina would become the eighth state to ratify the constitution.

Though South Carolina may have been more removed from some of the Revolutionary concerns than states like Massachusetts and Connecticut, it hosted some pivotal, if seemingly small, battles. They all begin with the hard-fought and devastating loss at Charles Town. What is now known as the Siege of Charleston is the largest battle ever in the state. Not even Civil War battles compare. While the British claimed the city and some 5,000 prisoners, the course was set for victories to the west at Cowpens and King’s Mountain.

Slavery and the Civil War play a significant role in South Carolina’s complex social, political, and economic profile. Yet, South Carolina reflects much of the beauty of the state in its soulful music and emotive art expressing the heritage of generations.

Harleston Green in Charleston established the first golf club in the United States in 1786.

With 187 miles of Atlantic coastline, South Carolina is more than ideal for a beach getaway. With idyllic oceanfront towns, historical tours, delicious seafood, and golf, everyone has a little bit of adventure.

HOW TO OBSERVE #NationalSouthCarolinaDay

Explore all of South Carolina’s beauty, culture, and history on August 31. Join National Day Calendar as we celebrate South Carolina’s hospitality, stunning landscapes, and dynamic people.  Use #NationalSouthCarolinaDay to share on social media.




Observed annually on August 31st, National Trail Mix Day honors the mix developed as a healthy snack for long hikes.

Filled with nuts, dried fruit, and grains, trail mix packs a boost of carbohydrates when the body needs it most. The nuts supply good fats as well as sustained energy, too. Since it’s lightweight, trail mix travels easily, as well. On long trails or while camping, trail mix keeps without spoiling since most of the ingredients are dried. 

Two California surfers claim the creation of trail mix. In 1968, they blended peanuts and raisins for an energy snack. However, in the 1958 novel The Dharma Bums written by Jack Kerouac, the two main characters mention trail mix when planning meals for their hiking trip. 

Trail mix is sometimes referred to as Gorp.

Trail Mix Tips

Regardless of who created trail mix, the food is an integral part of camping, hiking, and outdoor life. When preparing for a hike, selecting a favorite combination of ingredients comes down to balancing flavor and nutrition. Some factors to keep in mind:

  • Portability – Be sure all the components can withstand heat and bouncing around. For example, potato chips and caramel baking bits probably won’t survive the heat. However, pretzel rods, M&Ms, and other candy-coated chocolates hold up under stress.
  • Protein – Choosing the right nuts and seeds adds healthy proteins and fats, too. Consider adding these top protein-producing seeds and nuts to your trail mix:
    • almonds, peanuts, pistachios, hemp, pepit, sunflower, flax, sesame, chia, cashews, walnuts, hazelnuts, pine nuts
  • Salty & Sweet – Not only does the flavor factor increase but the salt, along with drinking plenty of water throughout your hike prevents dehydration. When we sweat, we lose essential electrolytes, and trail mix helps to replenish them. The salt comes from the ingredients already added to the mix. There’s no need to add more. And the sweet? Well, that all depends on your tastes. How much additional glucose do your physical needs require?
  • Spice – Ramp up the flavor profile with some spice. Here are a few combinations to try:
    • Fall blend – cinnamon, nutmeg, cloves, allspice, ginger
    • Savory blend– garlic powder, dill, lemon pepper
    • Spicy blend – wasabi, mustard powder, lemon pepper, dried cilantro, dried lime zest
    • Spicy sweet blend – paprika, cumin, chili powder, garlic powder, a touch of brown sugar
  • Energy Booster – For a twist, add chocolate-covered roasted coffee beans to your mix. They’re especially nice if time is short or it’s impossible to make a cup of java while roughing it. You’ll get your caffeine and your breakfast while seeking the next fantastic view.

HOW TO OBSERVE #NationalTrailMixDay

You can make your own trail mix using your favorite ingredients. Many varieties of trail mix are available at your favorite grocery or convenience store. How else can you celebrate:
  • Take a hike and enjoy your favorite trail mix along the way.
  • Share your favorite trail mix recipes.
  • Take a selfie while enjoying your energy boost.
Use #NationalTrailMixDay to post on social media.
With so many ways to make trail mix, sometimes the nuts make all the difference. Check out 9 Delicious Nuts from Around the World to learn more!
Educators, visit the National Day Calendar Classroom for a lesson designed especially for trail mix.


We were unable to find the creator of National Trail Mix Day.

Trail Mix FAQ

Q. Where does the word “gorp” mean?
A. According to the Oxford English Dictionary, gorp means to eat greedily. However, a backronym (an acronym developed after a word is coined) suggests that gorp stands for Good Ol’ Raisins and Peanuts.

Q. What do other countries call trail mix?
A. Australians and New Zealanders call trail mix “scroggin.”

August 31st Celebrated (and Not So Celebrated) History

King Kamehameha III declares Honolulu, HI a city and the official capital of the kingdom of Hawaii.


Thomas Edison receives patent No. 589,168 for the kinetoscope camera opening up an era of moving pictures.


Benjamin Shibe receives a patent for his invention of a baseball with a cork center under patent No. 932,911.


Henry Blair receives a patent for a cotton seeder. As the second African American to receive a U.S. patent after Thomas Jennings. The cotton seeder was Blair’s second patent.


Glenn Hammond Curtiss completes the first U.S. airplane flight over water. Curtiss is considered the father of the aircraft industry.


The first U.S. Navy ship named after an African American is commissioned. Named after Mess Attendant First Class Leonard Roy Harmon, the USS Harmon honors the sailor’s courageous and invaluable service during the Battle of Guadalcanal in 1942.


Warner Bros. debuts Foghorn Leghorn in the Looney Tunes short called Walky Talky Hawky.


General Motors Corp debuts the first solar-powered automobile when Willaim G. Cobb demonstrates the Sunmobile.


Dr. Michael E. Bakey leads the first simultaneous multi-organ transplant. The transplant included a single donor and four recipients.


Time After Time starring Malcolm McDowell, David Warner, and Mary Steenburgen is released. The film combines the imagination of H.G. Well’s Time Machine with the pursuit of Jack the Ripper.

Recipe Of The Day

Incredible Meatloaf recipe

Incredible Meatloaf
Prep: 10 minutes
Cook: 60 minutes
Total: 1 hour 10 minutes
Servings: 8


1 lb 90% lean ground beef
1 medium onion, diced
1 large egg
1 clove garlic, minced
3/4 cup bread crumbs
1 package vegetable soup mix
1/2 cup milk
1 tablespoon Worcestershire sauce

Topping Ingredients

1/4 cup ketchup
2 tablespoon packed brown sugar
1 tablespoon apple cider vinegar


Heat oven to 350°F.

In a large bowl combine ground beef, onion, egg, garlic, bread crumbs, soup mix, milk and Worcestershire sauce. Mix with hands until well incorporated.

Line a baking sheet with parchment paper and mold the beef mixture into a loaf.

Bake for 50 minutes.

While the meatloaf is baking, mix the remaining ingredients in a small bowl. Top the meatloaf with the sauce and return to the oven for an additional 10 minutes.

August 31st Celebrated (and Not So Celebrated) Birthdays
Mary Putnam Jacobi – 1842

Jacobi became the first woman to study at the Academy of Medicine in France.

Maria Montessori – 1870

The Italian physician and educator is best known for her educational method. Today, nearly 20,000 Montessori schools provide educational services around the world.

Lizzie Arlington – 1877

Arlington debuts in minor league baseball with the Reading Coal Heavers. Born Elizabeth Stroud, debuts in minor league baseball with the Reading Coal Heavers. During her short-lived career, she played pitcher and second base.

Arthur Godfrey – 1903

Also known as the “Ol’ Redhead,” Godfrey hosted both radio and television programs.

Helen Levitt – 1913

Levitt was known for her New York street photography.

Richard Gere – 1949

The actor is known for films such as American Gigalo, Pretty Woman, and Primal Fear. He also co-founded the non-profit organization Tibet House.

Fredric March – 1897

Best known for his role in Dr. Jekyll and Mr. Hyde, March also starred in the films The Best Years of Our Lives, A Star is Born and Inherit the Wind.

Marcia Clark – 1953

The U.S. prosecutor rose to fame during the O.J. Simpson murder case.

Sara Ramirez – 1975

The actress is best known for her role as Callie Torres on the television medical drama Grey’s Anatomy.

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 FacebookTwitter, 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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