Here is a list of links to strange, fun and unofficial holidays celebrated in August. Links in boldface are profiled on Worldwide Weird Holidays.
August
Dates change annually
First week
National Doll Day
National Mustard Day
Second week
National Garage Sale Day
National Kids Day
Fourth week
Wisconsin State Cow Chip Throw
August 1
World Middle Finger Day
Raspberry Cream Pie Day
Lammas
Lughnasadh
National Girlfriends Day
National Minority Donor Awareness Day
National Raspberry Cream Pie Day
Play Ball Day
Respect for Parents Day
Rounds Resounding Day
Spiderman Day
US Air Force Day
Woman Astronomers Day
World Wide Web Day
August 2
National Ice Cream Sandwich Day
National Night Out
August 3
National Watermelon Day
Airplane Crop Duster Day
Esther Day
Grab Some Nuts Day
August 4
U.S Coast Guard Day
Assistance Dog Day
Hooray for Kids Day
National Chocolate Chip Cookie Day
National IPA Day
National White Wine Day
Single Working Women’s Day
August 5
Curiosity Day
Braham Pie Day
Green Peppers Day
International Beer Day
International Traffic Light Day
National Oyster Day
National Underwear Day
Work Like a Dog Day
August 6
Corporate Baby Name Day
Hiroshima Day
Mead Day
National Fresh Breath Day
National Gossip Day
National Root Beer Float Day
Taxpayer Appreciation Day
Wiggle Your Toes Day
August 7
Purple Heart Day
American Family Day
Beach Party Day
Friendship Day
International Forgiveness Day
National Lighthouse Day
National Sea Serpent Day
Particularly Preposterous Packaging Day
Professional Speakers Day
Raspberries ‘n Cream Day
Sister’s Day
August 8
Happiness Happens Day
International Cat Day
National Dollar Day
National Frozen Custard Day
National Zucchini Day
Odie Day
Victory Day
August 9
National Veep Day
Book Lovers Day
International Day of the World’s Indigenous People
National Hand Holding Day
National Polka Day
National Rice Pudding Day
August 10
National S’mores Day
National Duran Duran Appreciation Day
National Lazy Day
National Spoil Your Dog Day
Smithsonian Day
World Lion Day
August 11
Presidential Joke Day
Annual Medical Checkup Day
Ingersoll Day
National Raspberry Bombe Day
National Raspberry Tart Day
Play in the Sand Day
Son and Daughter Day
August 12
Baseball Fans Day
IBM PC Day
International Youth Day
National Julienne Fries Day
National Kool-Aid Day
National Middle Child’s Day
National Sewing Machine Day
Truck Driver Day
Vinyl Record Day
World Elephant Day
August 13
Celebrate Your Lakes Day
International Left-Handers Day
National Filet Mignon Day
August 14
Color Book Day
National Creamsicle Day
National Financial Awareness Day
National Navajo Code Talkers Day
National Wiffle Ball Day
August 15
Cupcake Day
I Love Cowboys and Cowgirls Day
National Failures Day
National Lemon Meringue Pie Day
National Relaxation Day
Nicolas Chauvin Day
August 16
National Airborne Day
National Bratwurst Day
National Roller Coaster Day
National Rum Day
National Tell a Joke Day
True Love Forever Day
August 17
National #2 Pencil Day
Baby Boomers Recognition Day
Balloon Airmail Day
National Black Cat Appreciation Day
National Medical Dosimetrist Day
National Thrift Shop Day
National Vanilla Custard Day
August 18
Helium Discovery Day
Mail Order Catalog Day
National Bad Poetry Day
National Ice Cream Pie Day
National Soft Ice Cream Day
Serendipity Day
August 19
‘Black Cow’ Root Beer Float Day
National Aviation Day
National Hot and Spicy Food Day
National Men’s Grooming Day
National Potato Day
National Sandcastle and Sculpture Day
World Humanitarian Day
World Photography Day
August 20
International Geocaching Day
International Homeless Animals’ Day
Lemonade Day
National Bacon Lovers Day
National Chocolate Pecan Pie Day
National Honey Bee Day
National Radio Day
Virtual Worlds Day
World Mosquito Day
August 21
National Spumoni Day
Poet’s Day
Senior Citizens Day
August 22
National Be an Angel Day
National Eat a Peach Day
National Pecan Torte Day
National Tooth Fairy Day
Southern Hemisphere Hoodie Hoo Day
August 23
Buttered Corn Day
European Day of Remembrance for Victims of Stalinism and Nazism
Hug Your Sweetheart Day
International Day for the Remembrance of the Slave Trade and its Abolition
National Spongecake Day
Ride the Wind Day
Valentino Day
August 24
Can Opener Day
International Day Against Intolerance, Discrimination and Violence Based on Musical Preferences, Lifestyle and Dress Code
International Strange Music Day
National Knife Day
National Peach Pie Day
National Waffle Day
Pluto Demoted Day
Shooting Star Day
Vesuvius Day
Weather Complaint Day
William Wilberforce Day
August 25
Kiss and Make Up Day
National Banana Split Day
National Secondhand Wardrobe Day
National Whiskey Sour Day
August 26
Forgive Your Foe Friday
Make Your Own Luck Day
Musical Yoga Day
National Cherry Popsicle Day
National Dog Day
National Toilet Paper Day
Women’s Equality Day
August 27
“The Duchess” Who Wasn’t Day
Just Because Day
Kiss Me Day
National Banana Lovers Day
National Burger Day
National Petroleum Day
National Pots de Crème Day
Pony Express Day
August 28
Dream Day Quest and Jubilee
International Read Comics in Public Day
National Bow Tie Day
National Cherry Turnovers Day
Radio Commercial Day
Red Wine Day
August 29
According to Hoyle Day
Chop Suey Day
International Day Against Nuclear Tests
Lemon Juice Day
More Herbs, Less Salt Day
Motorist Consideration Monday
National Sarcoidosis Awareness Day
National Swiss Winegrowers Day
August 30
Frankenstein Day
International Day of the Disappeared
National Beach Day
National Holistic Pet Day
National Toasted Marshmallow Day
Slinky Day
August 31
Eat Outside Day
Love Litigating Lawyers Day
National Trail Mix Day
We Love Memoirs Day