Last updated: April 5, 2021 – 304 hashtag holidays

This list starts with the hashtag holidays by day, followed by the celebration months. There’s a little duplication because that’s the nature of made up holidays. Some also rotate year-to-year and we’re still working at identifying those. If you know a holiday that’s missing or we’ve made a mistake, please let us know!

Hashtag holidays with rotating dates are identified by the year. Official public holidays have the country and state, if state-based.

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April 1

April Fool’s Day | DIY Day | One Cent Day | Fun Day | DNA Day | Sourdough Bread Day | Reading is Fun Day | Atheist Day | National Burrito Day (2021)

April 2

International Children’s Book Day | National Peanut Butter and Jelly Day | Ferret Day | Love Your Produce Manager Day | World Autism (Awareness) Day | Pascua Florida Day | Good Friday (2021 Australia and DE, HI, IN, KY (half-day), LA, NJ, NC, PA, TN – USA)

April 3

Tweed Day | Don’t Go To Work Unless It’s Fun Day | Chocolate Mousse Day | Fish Fingers and Custard Day | World Party Day | Find a Rainbow Day | Day of Hope Isra and Mi’raj | Easter Saturday (2021) | Holy Saturday (2021) | National Film Score Day | National Love Our Children Day (2021) | National Handmade Day

April 4

Tell-A-Lie Day | Vitamin C Day | World Rat Day | Kickball Day | Cordon Bleu Day | D.A.R.E Day | Carrot Day | Walk Around Things Day | Easter Sunday (2021) | Geologists Day (2021) | Hug a Newsperson Day | National School Librarian Day

April 5

Read a Road Map Day | Go for Broke Day | Walk to Work Day | Deep Dish Pizza Day | Star Trek First Contact Day | Caramel Day | Poet in a Cupcake Day | Hospital Admitting Clerk Day | Easter Monday (2021) | Flash Drive Day | National Raisin and Spice Bar Day

April 6

Sorry Charlie Day | Pillow Fight Day | National Teflon Day | Tangible Karma Day | Army Day | World Table Tennis Day | Caramel Popcorn Day | International Firewalk Day | Plan Your Epitaph Day | New Beer’s Eve | DIY Day | National Tartan Day | Easter Tuesday (2021 Tas – Australia) | National Carbonara Day | Day of Sport for Development and Peace | Student Athlete Day | National Library Workers Day (2021)

April 7

National Beer Day #NationalBeerDay | No Housework Day | Beaver Day | World Health Day | National Walking Day (2021) | National Coffee Cake Day

April 8

All Is Ours Day | Draw a Picture of a Bird Day | Zoo Lovers Day | Rex Manning Day | National Empanada Day

April 9

Winston Churchill Day | Name Yourself Day | Unicorn Day | Be Kind to Lawyers Day | Equal Pay Day | Cherish an Antique Day | Name Yourself Day | International ASMR Day | Chinese Almond Cookie Day | National Day of Silence

April 10

Siblings Day #NationalSiblingsDay | Golfers Day | Bookmobile Day | International Safety Pin Day | Day of Pink | World Homeopathy Day | Cinnamon Crescent Day | Encourage a Young Writer Day | National Farm Animals Day

April 11

Pet Day #NationalPetDay | Eight-Track Tape Day | Cheese Fondue Day | Barbershop Quartet Day | Submarine Day | World Parkinson’s Disease Day

April 12

Bookmobile Day | Teach Your Children to Save Day | Deskfast Day | Walk on Your Wild Side Day | Grilled Cheese Sandwich Day | Licorice Day | Day of Silence | Ramadan (2021) | National Big Wind Day

April 13

Scrabble Day | Blame Somebody Else Day | Thomas Jefferson’s Birthday | National Make Lunch Count Day | National Peach Cobbler Day

April 14

National Pecan Day | Dolphin Day | Look Up at the Sky Day | Moment of Laughter Day | World Chagas Disease Day | National Gardening Day | Reach As High As You Can Day | National ExSpouse Day

April 15

Microvolunteering Day | Rubber Eraser Day | Tax Day (USA but the 2021 submission date has been changed to May 17) | That Sucks! Day | Take a Wild Guess Day | ASL Day | Anime Day | World Art Day | Get to Know Your Customers Day | National High Five Day | Glazed Spiral Ham Day

April 16

National Stress Awareness Day | National Eggs Benedict Day | Emancipation Day (DC, USA) | Wear Your Pajamas to Work Day | Save the Elephant Day | World Voice Day | Healthcare Decisions Day | National Orchid Day | Clean Out Meds Day (2021)

April 17

National Cheeseball Day | Haiku Poetry Day | Blah Blah Blah Day | Ford Mustang Day | Nothing Like a Dame Day | Bat Appreciation Day | National Crawfish Day | World Hemophilia Day | National Record Store Day (2021)

April 18

International Jugglers Day | Columnists Day | College Student Grief Awareness Day | Amateur Radio Day | Pet Owners Independence Day | High Five Day (2021) | World Heritage Day | International Day for Monuments and Sites | National Animal Crackers Day | National Lineman Appreciation Day

April 19

Garlic Day | Bicycle Day | Hanging Out Day | Rice Ball Day | Poetry and the Creative Mind Day | Patriots Day (2021 – ME, MA – USA) | National Amaretto Day

April 20

National Look-alike Day #NationalLookAlikeDay | Volunteer Appreciation Day (also called Volunteer Recognition Day) | Auctioneers Day | Chinese Language Day | Husband Appreciation Day | National Cheddar Fries Day | Pineapple Upside-down Cake Day

April 21

Kindergarten Day | Bulldogs are Beautiful Day | World Creativity and Innovation Day | American Red Cross Giving Day | Chocolate-Covered Cashews Day | National Banana Day | National Tea Day (also called British National Tea Day) | National Yellow Bat Day

April 22

Earth Day #EarthDay (also called International Mother Earth Day and Mother Earth Day) | National Jelly Bean Day | Oklahoma Day | Thank You Thursday | Teach Children to Save Day

April 23

Talk Like Shakespeare Day | World Book Night | Read Me Day | World Laboratory Animal Day | World Book Day | German Beer Day | English Language Day | Lost Dog Awareness Day | Spanish Language Day | World Book and Copyright Day | International Day of the Book | National Picnic Day | National Take a Chance Day

April 24

National Pigs in a Blanket Day | Administrative Professionals Day | International Guide Dogs Day | Independent Bookstore Day | Who Made My Clothes Day | Fashion Revolution Day | Meningitis Day | Pool Opening Day (2021) | Sense of Smell Day (2021) | World Tai Chi Day (2021)

April 25

Denim Day #DenimDay | National Zucchini Bread Day | Take Our Daughters and Sons to Work Day | World Penguin Day | Hug a Plumber Day | Poem in your Pocket Day | Malaria Day | Love Your Thighs Day | Anzac Day (NSW, SA, Tas, Vic, WA – Australia) | “The Perfect Date” from Miss Congeniality | Parental Alienation Awareness Day | National Telephone Day | National DNA Day

April 26

Richter Scale Day | National Pretzel Day | Hug an Australian Day | Hairball Awareness Day | Alien Day | Help a Horse Day | National Kids and Pets Day | College Student Grief Awareness Day | Anzac Day (ACT, NT, Qld, SA, WA – Australia) | Confederate Memorial Day (2021 – FL, USA) | Intellectual Property Day (also called World IP Day) | National Dissertation Day

April 27

Tell a Story Day | Poem in Your Back Pocket Day | Marine Mammal Rescue Day | Morse Code Day | Save the Frogs Day | Go Birding Day | World Veterinary Day | International Marconi Day | Prime Rib Day | World Tapir Day | National Devil Dog Day

April 28

Great Poetry Reading Day | Kiss-Your-Mate Day | Workers’ Memorial Day | Pinhole Photography Day | Blueberry Pie Day | Cubicle Day | Biological Clock Day | Pay It Forward Day | National Brave Hearts Day | Clean Comedy Day | Superhero Day | World Day for Safety | International Guide Dog Day (2021)

April 29

National Shrimp Scampi Day | International Dance Day | Zipper Day | World Wish Day | National Peace Rose Day

April 30

National Honesty Day #NationalHonestyDay | International Jazz Day | Oatmeal Cookie Day | Arbor Day (2021 – NE, USA) | Orthodox Good Friday | Adopt a Shelter Pet | National Bubble Tea Day | National Bugs Bunny Day | National Raisin Day

April Hashtag Holidays

Bleeding Disorders Awareness Month | National Cheerleader Safety Month | National Colorectal Cancer Awareness Month | National Endometriosis Awareness Month | National Kidney Month | National Nutrition Month | Problem Gambling Awareness Month | Save Your Vision Month | Trisomy Awareness Month | Workplace Eye Wellness Month | National Celery Month | National Flour Month | National Frozen Food Month | National Nutrition Month | National Noodle Month | National Peanut Month | National Sauce Month | National Caffeine Awareness Month | Irish American Month | Music in Our Schools Month | National Craft Month | National Women’s History Month | Red Cross Month | Social Workers Month | World Autism Month

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Cover Photo by Dan Dumitriu on Unsplash