Here is a list of links to strange, fun and unofficial holidays celebrated in June. Links in boldface are profiled on Worldwide Weird Holidays.
June 1
Heimlich Maneuver Day
Dare Day
Flip a Coin Day
Global Day of Parents
International Children’s Day
National Go Barefoot Day
National Hazelnut Cake Day
National Running Day
National Tailors’ Day
Oscar The Grouch Day
Say Something Nice Day
Stand For Children Day
Wear a Dress Day
World Milk Day
June 2
National Doughnut Day – 2017
International Sex Workers Day
Hug an Atheist Day – 1st Friday
I Love My Dentist Day
National Bubba Day
National Leave the Office Early Day
National Rocky Road Day
National Rotisserie Chicken Day
Yell ‘Fudge’ at the Cobras in North America Day
June 3
Repeat Day
Chimborazo Day
National Chocolate Macaroon Day
National Egg Day
June 4
Old Maid’s Day
Audacity to Hope Day
Drawing Day
Hug your Cat Day
National Applesauce Cake Day
National Cheese Day
National Cognac Day
National Trails Day
Turtle Races Day
June 5
Festival of Popular Delusions Day
Apple II Day
Hot Air Balloon Day
International Frozen Yogurt Day
National Cancer Survivors Day
National Moonshine Day
World Environment Day
June 6
National Yo-Yo Day
Atheist Pride Day
D-Day
Drive-in Movie Day
National Gardening Exercise Day
Russian Language Day
June 7
VCR Day
Daniel Boone Day
National Chocolate Ice Cream Day
June 8
Hannah Duston Day
Best Friends Day
Betty Picnic Day
Name Your Poison Day
National Caribbean-American HIV/AIDS Awareness Day
Upsy Daisy Day
World Brain Tumor Day
World Oceans Day
June 9
Donald Duck Day
National Strawberry-Rhubarb Pie Day
World APS Day
June 10
Banana Split Festival Day
Alcohol Anonymous Founders’ Day
Ballpoint Pen Day
National Herbs and Spice Day
National Iced Tea Day
June 11
Buzzard Day – 2016
Belmont Stakes
Corn on the Cob Day
Cousteau Day
International Young Eagles Day
National German Chocolate Cake Day
National King Kamehameha Day
National Making Life Beautiful Day
National Rosé Day
World Gin Day
June 12
National Jerky Day
Career Nurse Assistants Day
Crowded Nest Awareness Day
Loving Day
Multicultural American Child Day
National Peanut Butter Cookie Day
Race Unity Day
Red Rose Day
Superman Day
World Day Against Child Labor
June 13
National Pigeon Day
Kitchen Klutzes of America Day
Sewing Machine Day
Weed Your Garden Day
June 14
Pop Goes the Weasel Day
Army’s Birthday
Family History Day
Flag Day
National Bourbon Day
National Strawberry Shortcake Day
Pause for the Pledge Day
World Blood Donor Day
World Pet Memorial Day
June 15
Magna Carta Day
Fly a Kite Day
Global Wind Day
National Lobster Day
National Smile Power Day
Native American Citizenship Day
Nature Photography Day
World Elder Abuse Awareness Day
Worldwide Day of Giving
June 16
Ladies’ Day
Bloomsday Fresh Veggies Day
International Day of the African Child
National Dump the Pump Day
National Fudge Day
Recess at Work Day
June 17
National Flip Flop Day – 2016
National Apple Strudel Day
National Cherry Tart Day
National Eat Your Vegetables Day
Stewart’s Root Beer Day
Work@Home Father’s Day
World Day to Combat Desertification and Drought
June 18
Polar Bear Swim – 2016
Baby Jumping Festival (El Colacho)
Autistic Pride Day
Go Fishing Day
International Panic Day
International Picnic Day
International Sushi Day
National Hollerin’ Contest Day
National Splurge Day
World Juggling Day
Worldwide Knit in Public Day
June 19
World Sauntering Day
Family Awareness Day
Garfield the Cat Day
Juneteenth
National Martini Day
World Sickle Cell Day
June 20
American Eagle Day
Anne and Samantha Day
Cuckoo Warning Day
International Surfing Day
National Daylight Appreciation Day
National Ice Cream Soda Day
National Vanilla Milkshake Day
The Longest Day
World Humanist Day
World Productivity Day
World Refugee Day
June 21
Go Skateboarding Day
Atheist Solidarity Day
Baby Boomers Recognition Day
National Peaches and Cream Day
World Handshake Day
World Music Day
June 22
National Onion Ring Day
National Chocolate Eclair Day
Stupid Guy Thing Day
June 23
Pink Flamingo Day
International Widows’ Day
Let It Go Day
National Pecan Sandies Day
National Pink Day
Public Service Day
Runner’s Selfie Day
SAT Math Day
Typewriting Day
June 24
Giggin’ for Grads Night – 2016
Celebration of the Senses Day
International Fairy Day
Museum Comes To Life Day
National Pralines Day
Swim a Lap Day
Take Your Dog to Work Day
World’s Ugliest Dog Day
June 25
World Championship Rotary Tiller Race – 2016
Color TV Day
Day of the Seafarer
Global Beatles Day
Global Smurfs Day
Great American Backyard Campout
National Catfish Day
National Strawberry Parfait Day
World Vitiligo Day
June 26
Barcode Day
Bear Memorial Day
America’s Kids Day
Beautician’s Day
Descendants’ Day
International Day in Support of Victims of Torture
National Canoe Day
National Chocolate Pudding Day
Tropical Cocktails Day
June 27
Happy Birthday to You Day
Decide to Be Married Day
Helen Keller Day
Industrial Workers of the World Day
International Ragweed Day
National Orange Blossom Day
National Post-Traumatic Stress Disorder Awareness Day
Please Take My Children to Work Day
Sunglasses Day
June 28
INTERNATIONAL CAPS LOCK DAY
Monday Holiday Law Day
Insurance Awareness Day
International Body Piercing Day
National Columnists’ Day
National Tapioca Day
Paul Bunyan Day
Tau Day
June 29
National Waffle Iron Day
Hug Holiday Day
National Almond Buttercrunch Day
National Camera Day
June 30
Social Media Day
Leap Second Time Adjustment Day
National Bomb Pop Day
National Handshake Day
National Meteor Day
National Organization for Women Day