| April Monthly Observances |
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| Alcohol Awareness Month |
| Cancer Control Month |
| Celebrate Diversity Month |
| (International) Cesarean Awareness Month |
| Couple Appreciation Month |
| Emotional Overeating Awareness Month |
| Fresh Florida Tomatoes Month |
| Grange Month |
| Holy Humor Month |
| Home Improvement Time (April-Sept.30) |
| Informed Women Month |
| Injury Prevention Month |
| International Customer Loyalty Month |
| International Daffynitions Month |
| International Twit Award Month |
| IBS (Irritable Bowel Syndrome) Month |
| Jazz Appreciation Month |
| Keep America Beautiful |
| Month of the Young Child |
| Month of the Military Child |
| National Car Care Month |
| National Child Abuse Prevention Month |
| National Decorating Month |
| National DNA & Genomics & Stem Cell Education & Awareness Month |
| National Donate Life Month |
| National Humor Month |
| National Kite Month |
| National Knuckles Down Month |
| National Landscape Architecture Month |
| National Occupational Therapy Month |
| National Parkinson's Awareness Month |
| National Prepare Your Home To Be Sold Month |
| National Pecan Month |
| National Pet First Aid Awareness Month |
| National Poetry Month |
| Nationally Sexually Transmitted Diseases (STDs) |
| National Sexual Assault Awareness Month |
| National Youth Sports Safety Month |
| Pharmacists War on Diabetes Month |
| Physical Wellness Month |
| Prevent Lyme in Dogs Month |
| Prevention of Animal Cruelty Month |
| Rosacea Awareness Month |
| School Library Media Month |
| Soy Foods Month |
| Straw Hat Month |
| Stress Awareness Month |
| Southern Belles Month |
| Women's Eye Health & Safety Month |
| Workplace Conflict Awareness Month |
| International School Spirit Season (April 30 - Dec. 26) |
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| April Weekly Observances |
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| Laugh at Work Week: 1-7 |
| Medication Safety Week: 1-7 |
| Testicular Cancer Awareness Week: 1-7 (aka Get A Grip Day!) |
| Hate Week: 4-10 |
| Alcohol-Free Weekend: 4-6 |
| North American Occupational Safety & Health Week: 5-10 |
| National Blue Ribbon Week: 6-12 |
| National Week of the Ocean: 6-12 |
| Explore Your Career Options: 7-11 |
| National Public Health Week: 7-11 |
| National Work Zone Safety Awareness Week: 7-11 |
| National Networking Week: 7-13 |
| Pan American Week: 13-19 |
| Pediatric Nurse Practitioner Week: 13-19 |
| National Crime Victims Rights Week: 13-19 |
| National Library Week: 13-19 |
| National Personal Training Week: 13-20 |
| Week of The Young Child: 13-19 |
| WOC Nurse Week: 13-19 |
| National Inspirational News Week: 13-19 |
| Young People's Poetry Week: 14-20 |
| National Occupational Health Nursing Week: 14-18 |
| National Wildlife Week: 19-27 |
| Administrative Professionals Week: 20-26 |
| Coin Week: 20-26 |
| Cowboy Poetry Week: 20-26 |
| Innovation Week: 20-26 |
| National Karaoke Week: 20-26 |
| National Park Week: 20-26 |
| National Window Safety Week: 20-26 |
| Sky Awareness Week: 20-26 |
| Fish Fry Week: 21-26 |
| Heritage Week: 21-26 |
| TV Turn-off Week: 21-27 |
| Global Road Safety Week: 23-29 |
| National Scoop the Poop Week: 24-30 |
| National Dance Week: 25-5/4 |
| National Dream Hotline: 25-27 |
| National & Global Youth Service Days: 25-27 |
| National Volunteer Week: 27-5/3 |
| Safe Kids Week: 4/27 to 5/3 |
| Police Officers Who Gave Their Lives In The Line of Duty Week: April 29-5/5 |
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| April Daily Observances |
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| April Fools or All Fools Day: 1 |
| Boomer Bonus Days: 1 |
| National Fun Day: 1 |
| National Fun at Work Day: 1 |
| Poetry & The Creative Mind Day: 1 |
| Sorry Charlie Day: 1 |
| St. Stupid Day: 1 |
| US Air force Day: 1 |
| Kick Butts Day: 2 |
| International Children's Book Day: 2 |
| National Day of Hope: 2 |
| Paraprofessional Appreciation Day: 2 |
| Reconciliation Day: 2 |
| Mule Day: 3-6 |
| National Alcohol Screening Day: 3 |
| Pony Express Day: 3 |
| Tweed Day: 3 |
| Hospital Admitting Clerks Day: 4 |
| International Day for Mine Awareness & Assistance in Mine Action: 4 |
| Victims of Violence Holy Day: 4 |
| World Rat Day: 4 |
| Accelerate ACL Awareness Among Young Women Day: 5 |
| National Birding Day: 5 |
| National Love Our Children Day: 5 |
| Tangible Karma Day: 5 |
| Drowsy Driver Awareness Day: 6 |
| Teflon Day: 6 |
| No Housework Day: 7 |
| World Health Day: 7 |
| National Cherish An Antique Day: 9 |
| National Former Prisoner of War Recognition Day: 9 |
| National D.A.R.E. Day: 10 |
| National Sibling Day: 10 |
| Salvation Army Founder's Day: 10 |
| Barbershop Quartet Day: 11 |
| International "Louie Louie" Day: 11 |
| World Parkinson's Disease Day: 11 |
| Trivia Days: 11-13 |
| Baby Massage Day: 12 |
| Licorice Day: 12 |
| Walk on Your Wild Side Day: 12 |
| International Plant Appreciation Day: 13 |
| Thomas Jefferson Day: 13 |
| Children with Alopecia Day: 14 |
| Pan American Day: 14 |
| Income Tax Pay Day: 15 |
| Take a Wild Guess Day: 15 |
| That Sucks Day: 15 |
| Equal Pay Day: 15 |
| International Moment of Laughter Day: 16 |
| International Stress Awareness Day: 16 |
| National Wear Your Pajamas To Work Day: 16 |
| Blah! Blah! Blah! Day: 17 |
| Ellis Island Family History Day: 17 |
| Ford Mustang Day: 17 |
| Get to Know Your Customers Day: 17 (also January 17, July 17 and October 16) |
| High Five Day: 17 |
| World Hemophilia Day: 17 |
| Comic (Books) Day: 18-20 |
| Pet Owners Independence Day: 18 |
| World Amateur Radio Day: 18 |
| YoYo Day: 18-20 |
| Husband Appreciation Day: 19 (3rd Saturday) |
| Oklahoma City Bombing Commemoration Day: 19 |
| Auctioneers Day: 19 |
| National Hanging Out Day: 19 |
| Passover: 19 |
| World Cow Chip Day: 19 |
| Astronomy Day: 21 Boston Marathon: 21 |
| Kindergarten Day: 21 |
| National Chocolate-covered Cashews Day: 21 |
| Chemists Celebrate The Earth Day: 22 |
| Earth Day: 22 |
| National Jelly Bean Day: 22 |
| Administrative Professionals Day or Secretary's Day: 23 |
| World Book & Copyright Day: 23 |
| Take Our Daughters & Sons to Work Day: 24 |
| Arbor Day: 25 |
| Starman Days: 25-27 |
| Red Hat Society Day: 25 |
| Note: This is the official day every year. |
| Various chapters will have their own birthday celebrations as well on different dates. |
| Bob Willis Day: 26 |
| Hug An Australian Day: 26 |
| Rebuilding Day: 26 |
| Richter Scale Day: 26 |
| World Tai Chi & Qigong Day: 26 |
| Mantanzas Mule Day: 27 |
| Mother, Father Deaf Day: 27 |
| Rural Life Sunday or Soil Stewardship Sunday: 27 |
| Bulldogs are Beautiful Day: 28 |
| Cubicle Day: 28 |
| Workers Memorial Day: 28 |
| National Hairball Awareness Day: 29 |
| Sense of Smell Day: 29 |
| National Teach Your Children To Save Day: 29 |
| National Dance Day: 29 |
| Beltane: 30 |
| Hairstylists Appreciation Day: 30 |
| Spank Out Day - USA: 30 |
| Walpurgis Night: 30 |
