| National Hangover Day | |  |
| National Fruitcake Toss Day | |  |
| National Bobblehead Day | |  |
| National Bubble Bath Day | |  |
| National JoyGerm Day | |  |
| National Shop for Travel Day | |  |
| National Step in the Puddle and Splash Your Friends Day | |  |
| National Rubber Ducky Day | |  |
| National Sticker Day | |  |
| International Kite Day | |  |
| Nothing Day | |  |
| National Winnie The Pooh Day | |  |
| One-Liners Day | |  |
| Global Belly Laugh Day | |  |
| National Compliment Day | |  |
| National Opposite Day | |  |
| National Big Wig Day | |  |
| National Fun At Work Day | |  |
| International Lego Day | |  |
| National Kazoo Day | |  |
| National Puzzle Day | |  |
| National Draw A Dinosaur Day | |  |
| National Inane Answering Message Day | |  |
| National Backward Day | |  |
| Bubble Gum Day | |  |
| Ice Cream for Breakfast Day | |  |
| National Shower with a Friend Day | |  |
| Laugh and Get Rich Day | |  |
| National Kite Flying Day | |  |
| Annoy Squidward Day | |  |
| National Gumdrop Day | |  |
| International Tug Of War Day | |  |
| National Tell a Fairy Tale Day | |  |
| National Pokemon Day | |  |
| National Tooth Fairy Day | |  |
| Toy Soldier Day | |  |
| Cinco de Marcho | |  |
| National Sock Monkey Day | |  |
| National Barbie Day | |  |
| International Day Of Awesomeness | |  |
| Mario Day | |  |
| Ken Day | |  |
| St. Urho’s Day | |  |
| National Let’s Laugh Day | |  |
| National Goof Off Day | |  |
| April Fool's Day | |  |
| Fun Day | |  |
| International Fun At Work Day | |  |
| National Humor Month | |  |
| World Party Day | |  |
| International Pillow Fight Day | |  |
| National No Housework Day | |  |
| Draw A Picture Of A Bird Day | |  |
| National Unicorn Day | |  |
| Walk On Your Wild Side Day | |  |
| National Scrabble Day | |  |
| International Moment of Laughter Day | |  |
| National That Sucks Day | |  |
| National Piñata Day | |  |
| International Dance Day | |  |
| National Bugs Bunny Day | |  |
| Beer Pong Day | |  |
| Hug A Shed And Take A Selfie Day | |  |
| World Laughter Day | |  |
| National Miniature Golf Day | |  |
| National Limerick Day | |  |
| Drawing Day | |  |
| National Pizza Party Day | |  |
| Take Your Parents To The Playground Day | |  |
| Rapture Party Day | |  |
| National Solitaire Day | |  |
| National Lucky Penny Day | |  |
| National Scavenger Hunt Day | |  |
| Sing Out Day | |  |
| National Paper Airplane Day | |  |
| National Grape Popsicle Day | |  |
| National Hole In My Bucket Day | |  |
| National Smile Day | |  |
| International Tabletop Day | |  |
| National Bubba Day | |  |
| National Yo-Yo Day | |  |
| Love Island Day | |  |
| National Upsy Daisy Day | |  |
| World Doll Day | |  |
| National Donald Duck Day | |  |
| International Bath Day | |  |
| World Juggling Day | |  |
| National Splurge Day | |  |
| National Garfield the Cat Day | |  |
| National Selfie Day | |  |
| International Fairy Day | |  |
| National Tell An Old Joke Day | |  |
| National Leon Day | |  |
| International Joke Day | |  |
| Be A Kid Again Day | |  |
| Video Games Day | |  |
| National Swimming Pool Day | |  |
| Eat Your Jello Day | |  |
| National Be A Dork Day | |  |
| World Emoji Day | |  |
| International Chess Day | |  |
| National Fortune Cookie Day | |  |
| National Hammock Day | |  |
| Carousel Day | |  |
| Gary Gygax Day | |  |
| National Walk On Stilts Day | |  |
| National Waterpark Day | |  |
| National Mahjong Day | |  |
| Odie Day | |  |
| National Presidential Joke Day | |  |
| Play In The Sand Day | |  |
| National Roller Coaster Day | |  |
| National Tell a Joke Day | |  |
| National Bad Poetry Day | |  |
| Serendipity Day | |  |
| National Tooth Fairy Day | |  |
| Never Bean Better Day | |  |
| National Cherry Popsicle Day | |  |
| Race Your Mouse Around The Icons Day | |  |
| National Slinky Day | |  |
| National Blueberry Popsicle Day | |  |
| International Sudoku Day | |  |
| National Teddy Bear Day | |  |
| No News Is Good News Day | |  |
| National Video Game Day | |  |
| Friday the 13th | |  |
| National Play-Doh Day | |  |
| National Table Shuffleboard Day | |  |
| International Talk Like a Pirate Day | |  |
| Big Whopper Liar Day | |  |
| Boys’ and Girls’ Club Day for Kids | |  |
| Miniature Golf Day | |  |
| National Dance Day | |  |
| National Girls’ Night In Day | |  |
| Binge Day | |  |
| National Chewing Gum Day | |  |
| Balloons Around the World Day | |  |
| World Smile Day | |  |
| National Get Funky Day | |  |
| American Touch Tag Day | |  |
| International Top Spinning Day | |  |
| National Bring Your Teddy Bear to Work/School Day | |  |
| It's My Party Day | |  |
| National Chess Day | |  |
| National Costume Swap Day | |  |
| National Motorcycle Ride Day | |  |
| National Color Day | |  |
| National Frankenstein Friday | |  |
| Plush Animal Lover’s Day | |  |
| National Doorbell Day | |  |
| National Knock-Knock Jokes Day | |  |
| National Magic Day | |  |
| National Jersey Friday | |  |
| National Hug A Bear Day | |  |
| Happy Hour Day | |  |
| Have A Party With Your Bear Day | |  |
| National Princess Day | |  |
| National Play Monopoly Day | |  |
| Bingo’s Birthday Month | |  |
| National Dice Day | |  |
| Bathtub Party Day | |  |
| Weary Willie Day | |  |
| Friday the 13th | |  |
| Barbie and Barney Backlash Day | |  |
| Games Day | |  |
| National Ugly Christmas Sweater Day | |  |
| Crossword Puzzle Day | |  |
| National Card Playing Day | |  |