• Alcohol Awareness Month
• Asian/Pacific American Heritage Month
• Celebrate Diversity Month
• Community Service Month
• National Sexual Assault Awareness Month

April 7th

• National Beer Day
• National Coffee Cake Day
• National Girl Me Too Day
• National No Housework Day
• National Bookmobile Day – Wednesday of National Library Week
• National Walking Day – First Wednesday in April
• Childhelp National Day of Hope – First Wednesday in April

April 8th

• National All is Ours Day
• National Empanada Day
• National Zoo Lovers Day
• National Alcohol Screening Day  – Thursday of First Full Week in April

April 9th

• National Cherish an Antique Day
• National Chinese Almond Cookie Day
• National Former Prisoner of War Recognition Day
• National Name Yourself Day
• National Unicorn Day
• National Winston Churchill Day

April 10th

• National Cinnamon Crescent Day
• Encourage a Young Writer Day
• National Farm Animals Day
• National Siblings Day

April 11th

• National Barber Shop Quartet Day
• National Cheese Fondue Day
• National Eight Track Tape Day
• National Pet Day
• National Submarine Day

April 12th

• National For Twelves Day
• National Big Wind Day
• National Colorado Day
• National Grilled Cheese Sandwich Day
• National Licorice Day 

April 13th

• National Make Lunch Count Day
• National Peach Cobbler Day
• National Scrabble Day
• National Thomas Jefferson Day

April 14th

• National Dolphin Day
• National Ex-Spouse Day
• National Gardening Day 
• National Pan American Day
• National Pecan Day
• National Reach as High as You Can Day
• Look Up at the Sky Day

April 15th

• National Banana Day
• National Glazed Spiral Ham Day
• National Rubber Eraser Day
• National Take a Wild Guess Day
• National Titanic Remembrance Day
• Purple Up! Day
• Get to Know Your Customers Day – Third Thursday of Each Quarter
• National High Five Day – Third Thursday in April

April 16th

• National Bean Counter Day
• National Eggs Benedict Day
• National Healthcare Decisions Day
• National Orchid Day
• National Wear Your Pajamas to Work  Day
• National Clean Out Your Medicine Cabinet Day – Third Friday in April

April 17th

• National Crawfish Day
• International Bat Appreciation Day
• National Cheeseball Day
• National Ellis Island Family History Day
• National Haiku Poetry Day
• National Record Store Day – Changes Annually
• National Auctioneers Day – Third Saturday in April

April 18th

• National Animal Crackers Day
• National Columnists’ Day
• National Lineman Appreciation Day

April 19th

• National Amaretto Day
• National Garlic Day
• National Hanging Out Day
• National North Dakota Day
• National Oklahoma City Bombing Commemoration Day

April 20th

• National Cheddar Fries Day
• National Lima Bean Respect Day
• National Look Alike Day
• National Pineapple Upside Down Cake Day

April 21st

• National Chocolate Covered Cashews Day
• National Kindergarten Day
• National Yellow Bat Day
• National Administrative Professionals’ Day – Wednesday of Last Full Week  in April

April 22nd

• National Earth Day
• National Girl Scout Leader’s Day
• National Jelly Bean Day
• National Take Our Daughters and Sons to Work Day – Fourth Thursday in April
• National Teach Children To Save Day – Changes Annually April 22, 2021

April 23rd

• National Cherry Cheesecake Day
• National Lost Dogs Awareness Day
• National Picnic Day
• National Take a Chance Day
• National Talk Like Shakespeare Day 
• National Day of Silence – Changes Annually April 23, 2021

April 24th

• National Pigs in a Blanket Day
• National Kiss of Hope Day – Last Saturday in April
• National Pool Opening Day – Last Saturday in April
• National Rebuilding Day – Last Saturday in April
• National Sense of Smell Day – Last Saturday in April

April 25th

• National DNA Day
• National East Meets West Day
• National Hug a Plumber Day
• National Telephone Day
• National Zucchini Bread Day
• National Pet Parents Day – Last Sunday in April

April 26th

• National Audubon Day
• National Dissertation Day
• National Help a Horse Day
• National Kids and Pets Day
• National Pretzel Day
• National Richter Scale Day
• National South Dakota Day

April 27th

• National Babe Ruth Day
• National Devil Dog Day
• National Prime Rib Day
• National Tell a Story Day

April 28th

• National Blueberry Pie Day
• National BraveHearts Day
• National Great Poetry Reading Day
• National Superhero Day
• Workers’ Memorial Day
• Denim Day – Changes Annually

April 29th

• National Peace Rose Day
• National Shrimp Scampi Day
• National Zipper Day 
• National Poem In Your Pocket Day – Changes Annually – April 29, 2021

April 30th

• National Adopt a Shelter Pet Day
• National Bubble Tea Day
• National Bugs Bunny Day
• National Honesty Day
• National Oatmeal Cookie Day
• National PrepareAthon! Day
• National Raisin Day
• National Sarcoidosis Day
• National Military Brats Day
• National Hairstylist Appreciation Day
• National Arbor Day – Last Friday in April
• National Hairball Awareness Day – Last Friday in April
• *Day * – Proclamation

Source: nationaldaycalendar.com