June 1st
- Dare Day
- Go Barefoot Day (National)
- Flip a Coin Day
- Heimlich Maneuver Day (National)
- Milk Day (World)
- Nail Polish Day (National)
- Olive Day (National)
- Oscar the Grouch Day
- Parents Day (Global)
- Pen Pal Day
- Reef Awareness Day (World)
- Say Something Nice Day (National)
- Stand for Children Day
- Superman’s Birthday (One of many… no clear date is known)
- Tabletop Day (International)
- Trails Day ~ The 1st Saturday in June
- Turtle Races Day ~ 1st Saturday of June
- Wear a Dress Day
June 2nd
- Animal Rights Day ~ 1st Sunday of June
- Bubba Day
- Cancer Survivors Day ~ 1st Sunday of June
- Children’s Awareness Memorial Day ~ 1st Sunday of June
- Clubfoot Day
- Gun Violence Awareness Day
- Leave the Office Early Day (National – If today falls on a Saturday/Sunday, then this is celebrated on the closest workday)
- Rocky Road Day
- Rotisserie Chicken Day
- Running Day (Global)
- Yell “Fudge” at the Cobras in North America Day
June 3rd
- Bicycle Day (World)
- Chimborazo Day
- Cider Day (World)
- Egg Day (National)
- Leave the Office Early Day (If today falls on a Saturday/Sunday, then this is celebrated on the closest workday)
- Moonshine Day (National)
- Repeat Day
- Thank God it’s Monday Day ~ 1st Monday of June
- Wonder Woman Day (one of two, both mentioned on DC Comics website)
June 4th
- Applesauce Cake Day
- Audacity to Hope Day
- Cheese Day (National)
- Day of Innocent Children Victims of Aggression
- Donut Day (National)
- Hug Your Cat Day (National)
- Old Maid’s Day
- SAFE Day
June 5th
- Apple II Day
- Baby Boomers Recognition Day
- Constitution Day
- Environment Day (World)
- Festival of Popular Delusions Day
- Hot Air Balloon Day
- Moonshine Day
- Prairie Day (National)
- Running Day ~ 1st Wednesday of June
- Tailors Day ~ 1st Wednesday of June
- Veggie Burgers Day
June 6th
- Atheist Pride Day
- Black Bear Day ~ 1st Saturday of June
- Bubbly Day ~ 1st Saturday of June
- Cancer Survivors Day (National)
- D-Day
- Drawing Day ~ 1st Saturday of June
- Drive-In Day
- Eyewear Day (National)
- Gardening Exercise Day (National)
- Higher Education Day
- Prairie Day ~ 1st Saturday of June
- Russian Language Day
- Trails Day ~ The 1st Saturday in June
- Turtle Races Day ~ 1st Saturday of June
- Yo-yo Day (National)
- YMCA Day
June 7th
- Boone Day
- Chocolate Ice Cream Day (National)
- Doughnut (Donut) Day ~ The 1st Friday in June
- Hug Your Cat Day ~ 1st Friday of June
- VCR Day
June 8th
- Belmont Stakes ~ 2nd Saturday of June
- Best Friends Day (National)
- Bike Naked Day ~ 2nd Saturday of June
- Caribbean-Americans HIV/AIDS Awareness Day
- Companies that Care Day
- Family Fitness and Health Day ~ 2nd Saturday of June
- Ghostbusters Day
- Gin Day
- Knit and Crochet in Public Day
- Marina Day ~ 2nd Saturday of June
- Missing Mutts Awareness Day ~ 2nd Saturday of June
- Name Your Poison Day
- Oceans Day (World)
- Rose Wine Day ~ 2nd Saturday of June
- Upsy Daisy Day
June 9th
- Abused Women and Children’s Day ~ 2nd Sunday of June
- APS ( Antiphospholipid Antibody Syndrome) Day
- Archives Day
- Children’s Sunday ~ 2nd Sunday of June
- Dark & Stormy Day (International)
- Donald Duck Day (National)
- Earl Baltes Day
- Multicultural American Child Day ~ 2nd Sunday of June
- Pentecost
- Strawberry Rhubarb Pie Day
- Toy Industry Day
- Whitsunday ~ 7th Sunday after Easter
June 10th
- AA Day (Alcoholics Anonymous) Day
- Ball Point Pen Day
- Herb and Spices Day
- Iced Tea Day (National)
- Race Unity Day
June 11th
- Call Your Doctor Day ~ 2nd Tuesday of June
- Corn on the Cob Day (National)
- Cotton Candy Day
- German Chocolate Cake Day (National)
- King Kamehameha Day
- Making Life Beautiful Day
- Pet Memorial Day ~ 2nd Tuesday of June
June 12th
- Crowded Nest Awareness Day
- Day Against Child Labor
- Jerky Day
- Loving Day (National)
- Peanut Butter Cookie Day (National)
- Rosè Day (National) ~ 2nd Saturday in June
- Red Rose Day
- Superman Day
June 13th
- Albinism Awareness Day
- Axe Throwing Day
- Nursing Assistants Day ~ The Monday of Nursing Assistants Week
- Random Acts of Light Day
- Roller Coaster Day
- Sewing Machine Day (National)
- Weed Your Garden Day
June 14th
- Army’s Birthday
- Bath Day
- Blood Donor Day (World)
- Bourbon Day (National)
- Family History Day
- Flag Day
- Hydroanencephaly Awareness Day
- Monkey Around Day
- Pause for the Pledge Day
June 15th
- Bug Busting Day (National)
- Day of Giving
- Day of Prayer for Law Enforcement Officers
- Elder Abuse Awareness Day (World)
- Flip Flop Day ~ The 3rd Saturday in June
- Global Wind Day
- Hollerin’ Contest Day ~ The 3rd Saturday in June
- Juggler’s Day ~ The closest Saturday to June 17th
- Magna Carta Day
- Mermaid Day ~ The 3rd Saturday in June
- Nature Photography Day
- Prune Day
- Smile Power Day
June 16th
- Bloomsday
- Day of the African Child (International)
- Family Awareness Day ~ The 3rd Sunday in June
- Father’s Day ~ The 3rd Sunday in June
- Fudge Day (National)
- Husband Caregiver Day ~ The 3rd Sunday in June
- Turkey Lovers Day ~ The 3rd Sunday in June
June 17th
- Combat Desertification and Drought Day
- Eat Your Vegetables Day (National)
- Fresh Veggies Day
- Garbage Man Day
- Stewart’s Root Beer Day
- Tesselation Day
June 18th
- Autistic Pride Day
- Go Fishing Day (National)
- Panic Day (International)
- Picnic Day (International)
- Splurge Day
- Sushi Day (International)
- Sustainable Gastronomy Day
June 19th
- American Eagle Day
- Box Day (International)
- Day for the Elimination of Sexual Violence in Conflict
- Free BSD Day
- Garfield the Cat Day (National)
- Juneteenth
- Martini Day (National)
- Sauntering Day
- Sickle Cell Day
- Watch Day
June 20th
- Bald Eagle Day (National, aka American Eagle Day)
- Bartender Day
- Dump the Pump Day ~ The 3rd Thursday in June
- Father’s Day ~ 3rd Sunday in June
- Hike with a Geek Day
- Ice Cream Social Day
- Kouign Amann Day
- Lambrusco Day
- Refugee Day (World)
- Productivity Day
- Recess at Work Day ~ The 3rd Thursday in June
- Ugliest Dog Day
- Vanilla Milkshake Day (National)
June 21st
- Ann & Samantha Day ~ On Summer & Winter Solstices
- Atheists Solidarity Day
- Cuckoo Warning Day ~ 1st day of Summer
- Day of the Gong
- Daylight Appreciation Day
- Giraffe Day
- Global Orgasm Day ~ On Summer & Winter Solstices
- Go Skateboarding Day
- Humanist Day
- Hydrography Day
- Midsummer’s Day
- Music Day (World)
- Sea Shell Day
- Selfie Day (National)
- Smoothie Day (National)
- Summer Solstice ~ date Varies
- Take a Road Trip Day ~ The 3rd Friday in June
- Tall Girl Appreciation Day ~ On Summer Solstice
- Ugliest Dog Day ~ The 3rd Friday of June
- World Handshake Day
- Yoga Day (International)
June 22nd
- Baby Boomer’s Recognition Day
- Chocolate Eclair Day
- Great American Backyard Campout ~ The 4th Saturday of June
- HVAC Technicians Day (National)
- Kissing Day (National)
- Onion Ring Day (National)
- Rainforest Day
- Smurfs Day
- Stupid Guy Thing Day
June 23rd
- America’s Kids Day ~ The 4th Sunday in June
- Columnists Day
- Eat at a Food Truck Day
- Hydration Day (National)
- Let it Go Day
- Pink Day (National)
- Pink Flamingo Day
- Public Service Day
- Runner’s Selfie Day
- Typing Day
- Typewriter Day (National)
- Widow’s Day
June 24th
- Celebration of the Senses Day
- Fairy (Faerie) Day
- Please Take My Children to Work Day ~ The Last Monday in June
- Pralines Day (National)
- Stonewall National Monument Day
- Swim a Lap Day
- UFO Day
- Work from Home Day (National)
June 25th
- Beatles Day (Global)
- Bourdain Day
- Catfish Day
- Color TV Day
- Columnists Day ~ The 4th Tuesday in June
- Day of the Seafarer (International)
- Leon Day
- Log Cabin Day
- Seafarer’s Day
- Take Your Dog to Work Day ~ The Friday after Father’s Day
June 26th
- ARRL Field Day
- Beautician’s Day
- Canoe Day
- Chocolate Pudding Day (National)
- Day Against Drug Abuse and Illicit Trafficking
- Day in Support of Victims of Torture
- Forgiveness Day
- Harry Potter Day
- Parchment Cooking Day ~ The last Wednesday in June
- Same-Sex Marriage Day
June 27th
- Bingo Day (National)
- Bomb Pop Day ~ The last Thursday in June
- Decide to be Married Day
- Hand Shake Day ~ The last Thursday in June
- “Happy Birthday to You” Day
- Helen Keller Day
- HIV Testing Day
- Industrial Workers of the World Day
- Micro, Small, and Medium-Sized Enterprises Day
- PTSD Awareness Day (National)
- Sunglasses Day (National)
June 28th
- Body Piercing Day
- Christopher Street Day
- Drive Your Corvette to Work Day
- Eat at a Food Truck Day ~ The last Friday in June
- Insurance Awareness Day (National)
- Paul Bunyan Day
- Tapioca Day (National)
- Tau Day
June 29th
- Camera Day (National)
- Day of the Tropics
- Haksap Berry Day ~ The last Saturday in June
- Hug Holiday
- Mud Day
- Scleroderma Day
- Waffle Day
June 30th
- Asteroid Day (International)
- Avocado Day
- Descendants Day ~ The last Sunday in June
- Log Cabin Day ~ The last Sunday in June
- Meteor Watch Day
- NOW (National Organization for Women) Day
- Social Media Day