April 1st
- April Fool’s Day
- Athiest Day
- Burrito Day (National) ~ 1st Thursday of April
- Fun at Work Day (International)
- Tatting Day (International)
April 2nd
- Children’s Book Day
- Good Friday ~ Date Varies
- Peanut Butter and Jelly Day (National)
- Reconciliation Day
- Walk to Work Day (National) ~ 1st Friday of April
April 3rd
- Don’t Go to Work Unless It’s Fun Day
- Find a Rainbow Day
- Tweed Day
- Party Day (World)
April 4th
- Easter Sunday ~ Date varies
- Hug a Newsman Day
- Rat Day (World)
- School Librarian Day
- Tell a Lie Day
- Walk Around Things Day
April 5th
- Dandelion Day (National)
- Deep Dish Pizza Day
- Dyngus Day
- Go for Broke Day
- Read a Road Map Day
April 6th
- California Poppy Day
- New Beer’s Eve
- Plan Your Epitaph Day
- Sorry Charlie Day
- Tartan Day (National)
- Teflon Day
April 7th
- Beaver Day (International)
- Beer Day (National)
- Caramel Popcorn Day
- Health Day (World)
- No Housework Day
- Walking Day (National)
April 8th
- All is Ours Day
- Draw a Picture of a Bird Day
- Zoo Lover’s Day
April 9th
- Name Yourself Day
- Winston Churchill Day
April 10th
- Farm Animals Day (National)
- Golfer’s Day
- Safety Pin Day
- Siblings Day (National)
April 11th
- Barbershop Quartet Day
- Eight Track Tape Day
- Pet Day (National)
- Submarine Day (National)
- Teach Children to Save Day (National) ~ date Varies
April 12th
- Big Wind Day
- Grilled Cheese Day
- Human Space Flight Day (International)
- Library Workers Day (National) ~ The Tuesday of Library Week
- Licorice Day (National)
- Ramadan (begins at sundown) ~ Date Varies
- Russian Cosmonaut Day
- Walk on Your Wild Side Day
April 13th
- Peach Cobbler Day (National)
- Plant Appreciation Day (International)
- Scrabble Day
April 14th
- Be Kind to Lawyers Day (International)
- Bookmobile Day (National) ~ 2nd Wednesday in April
- Cake and Cunningulus Day
- Dolphin Day (National)
- Ex Spouse Day
- Look up at the Sky Day
- Moment of Laughter Day (International)
- Pecan Day (National)
- Reach as High as You Can Day
April 15th
- Art Day (World)
- High Five Day (National) ~ 3rd Thursday of April
- Rubber Eraser Day
- Take a Wild Guess Day
- That Sucks Day
- Titanic Remembrance Day
April 16th
- Bean Counter Day (National)
- Eggs Benedict Day (National)
- Librarian Day (National)
- Mushroom Day
- Save the Elephant Day
- Stress Awareness Day (National) ~ 1st workday after Tax Day
- Wear Pajamas to Work Day
April 17th
- Bat Appreciation Day
- Blah, Blah, Blah Day
- Cheeseball Day (National)
- Circus Day (World) ~ 3rd Saturday in April
- Haiku Poetry Day (International)
- Herbalist Day
- Husband Appreciation Day ~ 3rd Saturday in April
- Record Store Day ~ 3rd Saturday in April
April 18th
- High Five Day ~ 3rd Thursday in April
- Juggler’s Day (International)
- Newspaper Columnists Day
- Pet Owner’s Independence Day
April 19th
- Bicycle Day
- Garlic Day (National)
- Hanging Out Day (National)
- Patriots’ Day ~ 3rd Monday of April
April 20th
- Chinese Language Day
- Lima Bean Respect Day
- Look Alike Day
- Volunteer Recognition Day
April 21st
- Administrative Professionals Day
- Executive Admin’s Day
- Kindergarten Day
- Secretary’s Day
April 22nd
- Earth Day (US)
- Girl Scout Leader Day
- Jelly Bean Day (National)
- Take Your Daughter to Work Day ~ 4th Thursday of April
April 23rd
- English Muffin Day (National)
- Laboratory Day (World)
- Lover’s Day
- Take a Chance Day
- Zucchini Bread Day (National)
April 24th
- Pig in a Blanket Day
April 25th
- DNA Day (National)
- East Meets West Day
- Penguin Day (World)
April 26th
- Hug an Australian Day
- Pretzel Day (National)
- Richter Scale Day
April 27th
- Babe Ruth Day
- Morse Code Day
- Prime Rib Day (National)
- Tell a Story Day
April 28th
- Astronomy Day (International)
- Great Poetry Reading Day
- Kiss Your Mate Day
April 29th
- Dance Day (International)
- Grocery Day
- Shrimp Scampi Day (National)
- Zipper Day (National)
April 30th
- Arbor Day ~ Last Friday of April
- Hairstyle Appreciation Day
- Honesty Day (National)
- Jazz Day (International)
- Mahjong Day (National)
- Raisin Day (National)