May 2026 Holidays

May 2026 Monthly Holidays

 

Adopt A Horse Month
ALS Awareness Month  Link
(Amyotrophic Lateral Sclerosis or Lou Gehrig's Disease) 
American Cheese Month  Link
America's Wetlands Month  Link
Apraxia Awareness Month   Link
Aramanth Month Link
Asian American, Native Hawaiian & Pacific Islander Heritage Month
Asthma Awareness Month
Awareness of Medical Orphans Month
Better Hearing & Speech Month Link
Better Sleep Month Link
Bladder Cancer Awareness Month  Link
Borderline Personality Disorder Month Link
Brain Tumor Awareness Month Link
Building Safety Month Link
Celiac Awareness Month Link
Chip Your Pet Month Link  Link
Clap 4 Health Month
Clean Air Month
Creative Beginnings Month
Cystic Fibrosis Awareness Month Link
Drum Month
EDS (Ehlers-Danlos Syndrome) Awareness Month Link
Family Reunion Month  (Between Mother's Day and Father's Day)
Family Wellness Month
Fibromyalgia Education and Awareness Month
Food Allergy Action Month
Freedom Shrine Month
Gardening for Wildlife Month
Get Caught Reading Month
Gifts From The Garden Month
Global Civility Awareness Month
Global Employee Health and Fitness Month
Global Health and Fitness Month
Global Youth Traffic Safety Month
Go Fetch! Food Drive for Homeless Animals Month 
Haitian Heritage Month
Heal the Children Month
Healthy Vision Month
Home Schooling Awareness Month
Huntington's Disease Awareness Month
International Audit Month Link
International Business Image Improvement Month
International Civility Awareness Month
Inherited Retinal Disease (IRD) Genetic Testing Month
International Mediterranean Diet Month
International Victorious Woman Month
Jewish-American Heritage Month
Latino Books Month
Lupus Awareness Month Link
Melanoma/Skin Cancer Detection & Prevention Month
Mental Health Month
Military Appreciation Month Link
Motorcycle Safety Awareness Month Link
Mystery Month
National Allergy/Asthma Awareness Month Link
National Arthritis Awareness Month
National Barbeque Month
National Better Hearing Month Link
National Bike Month Link
National Brain Tumor Awareness Month Link
National Chamber Music Month Link
National Child Passenger Safety Technician Month
National Electrical Safety Month  Link
National Foster Care Month Link
National Good Car Keeping Month
National Hamburger Month  Link  Link
National Hepatitis Awareness Month
National High Blood Pressure Education Month  Link
National High Potassium Awareness Month
National Inventors Month Link
(World) Lyme Disease Awareness Month Link
National Meditation Month
National Mediterranean Diet Month Link  Link
National Mental Health Month
National Military Appreciation Month
National Osteoporosis Awareness & Prevention Month
National Photo Month
National Physical Fitness & Sports Month
National Physiotherapy Month Link
National Preservation Month
National Read To Your Baby Bump Month
National Recommitment Month  Link
National Salad Month
National Salsa Month (The Sauce)
National Service Dog Eye Examination Month  Link 
National Smile Month Link  (May 15-June 15)
National Stop The Bleed Month  Link
National Strawberry Month
National Stroke Awareness Month
National Sweet Vidalia Onions Month
National Syringomyelia Awareness Month  Link  
National Tuberous Sclerosis Month Link
National Water Safety Month Link
National Vinegar Month
National Youth Traffic Safety Month Link
Necrotizing Fasciitis Awareness Month
Neurofibromatosis Awareness Month (aka NF Month) Link
Older Americans Month
Oncology Nurses Month Link
Pediatric Feeding Disorder Awareness Month  Link
Pediatric Stroke Awareness Month  Link
Personal History Month Link
Prader-Willi Syndrome Awareness Month
Preeclampsia Awareness Month Link
Prepare Tomorrow's Parents Month (5/11-6/15)
React Month
Revise Your Work Schedule Month
Save Your Tooth Month
Social Security Education Awareness Month
Skin Cancer Awareness Month  Link
Spiritual Literacy Month
Strike Out Strokes Month
Sturge-Weber Awareness Month Link
Teen CEO Month
Tennis Month
Tay-Sachs and Canavan Diseases Month
Textile Month  Link
Tourettes Syndrome Awareness Month (5/15 - 6/15) Link
Toxic Encephalopathy and Chemical Injury Awareness Month Link
Trauma Awareness Month
Ultra-violet Awareness Month
Women's Health Care Month
Worldwide Home Schooling Awareness Month
Young Achievers of Tomorrow Month
National Family Month (5/12 to 6/16) 

May 2026 Weekly Holidays

Barbed Wire Days: 1-3 (First weekend)
Spring Astronomy Week: 2-9 (Always has Spring Astronomy Day 5/7)
Toad Suck Daze: 2-3 (First Weekend)
National Small Business Week: 3-9 Link
Be Kind To Animals Week:  3-9 (First Full Week)
Dating and Life Coach Recognition Week: 3-9 Link (First Full Week)
Dog Anxiety Awareness Week: 3-9 (First Full Week)
Drinking Water Week:  3-9  Link (First Full Week)
Flexible Work Arrangement Week: 3-9  (First Full Week)
Goodwill Industries Week: 3-9  (First Full Week)
Geek Week: 3-9  Link  (First Week)
National Hug Holiday Week: 3-9 (First Week)
International Clitoris Awareness Week: 3-9(First Full Week)
National Alcohol & Drug Related Birth Defects Awareness Week: 3-9 (First Full Week)
National Anxiety & Depression Awareness Week:  3-9 (First Full Week)
National Correctional Officers Appreciation Week: 3-9  (First Full Week) Link
National Family Week:  3-9  (First Full Week)
National Hurricane Preparedness Week: 3-9 (First Full Week)
National Pet Week:  3-9  Link  (First Full Week)
National Travel & Tourism Week: 3-9 Link  (First Full Week)
National Week of Action for Missing and Murdered Indigenous Women (MMIW): 4-8 Link
National WildflowerWeek: 3-9 (First Full Week Sun-Sat)
Peripheral Neuropathy Awareness Week: 3-9 Link  (First Full Week)
Pet Appreciation Week: 3-9 (First Full Week)  Link Link
Public Service Recognition Week:3-9 (First Full Week) Link
Screen-Free Week (Digital Detox Week) : 3-9 Link (First Full Week)
Update Your References Week:  3-9 (First Full Week)
*(World) Dystonia Awareness Week: 3-11 Link
Air Quality Awareness Week: 4-8 Link  (First M-F)
Children's Book Week: 4-10 (First full week starting Monday) Link  (Also Nov. 8-14)
Construction Safety Week: 4-8 Link
National Safety Stand Down Week: 4-8 Link
North American Occupational Safety & Health Week: 4-8 (First M-F Week)  Link
PTA Teacher Appreciation Week: 4-8 (First Full M-F Week)
Teacher Appreciation Week: 4-8 (First Full Week M-F)
*National School Nurse Week: 6-12
*National Nurses Day and Week: 6-12 Link  Link
National Public Gardens Week: 8-17 Link (Friday before to the Sunday after Mother’s Day)
*Universal Family Week: 10-16 
Display Week: 10-15 Link (Sun-Fri)
Economic Development Week: 10-16  Link
Food Allergy Awareness Week: 10-16 (2nd Full Week) Link
International New Friends,Old Friends Week: 10-16
National Hospital Week: 10-16 Link
National Nursing Home Week: 10-16 (Starts Mother's Day to Saturday)
National Police Week: 10-16 (Has 15th in it)
National Return To Work Week:  10-16 (2nd Full Week)
National Root Canal Appreciation Week: 10-16 Link (Always Has 10th in it)
National Skilled Nursing Care Week: 10-16 Link
National Stuttering Awareness Week: 10-16 (Second full Week)
National Tick Awareness Week:10-16 (Seond Week)
National Transportation Week:10-16 (Always Includes the 3rd Friday)
National Women's Health Week:10-16 (Second Full Week)
Neuroscience Nurses Week: 10-16
Reading is Fundamental Week: 10-16 Link  (Second Full Week)
Salute to Moms 40+ Week: 10-16 (Starts on Mothers Day)
Salvation Army Week: 10-16  (Second Week)
Work At Home Moms Week:  10-16 (Starts on Mother's Day)
American Craft Beer Week: 11-17 Link (Begins 2nd Monday of Full Week)
Hoarding Awareness Week: 11-15 (M-F Second Week)  Link
International Coaching Week: 11-17 Link
National Sun Awareness Week: 11-17 Link
National Bike to Work Week: 11-15 Link  (Second Week M-F) 
National Etiquette Week: 11-15  (Begins Second Monday of Full Week)
National Stationery Week: 11-17  Link
National Stuttering Awareness Week: 11-17 (Second Week)
PGA Championships: 11-17
Cannes Film Festival: 12-23
*National Foul Ball Week: 16-21
International Heritage Breeds Week: 16-22 Link (Begins 3rd Sat.)
National Safe Boating Week: 16-22 (Seven days ending on the Friday before Memorial Day)
Neuroscience Nurses Week: 17-23 Link (Third Week)
EMS Week: 17-23 (3rd Full Week)  Link  Link  Link Link
Healthcare Documentation Integrity Week: 17-23 Link
Healthy and Safe Swimming Week: 17-23 (Week before Memorial Day M-S) Link
International New Friends, Old Friends Week: 17-23(3rd Week)
National Backyard Games Week: 17-23 (Week before Memorial Day)
National Eosinophil Awareness Week: 17-23 Link  (Third Week)
National Medical Transcription Week: 17-23 Link (Third Full Week)
National Unicycle Week: 17-23  (Begins on Third Sunday)
World Trade Week: 17-23 (Third Week)
National Seat Belt Reinforcement Week:18-30  Link
Mule Days: 19-24  Link
Old-Time Player Piano Weekend:21-24 Link
Mudbug Madness Days:  22-25 (Memorial Day Weekend)  
National Polka Weekend: 22-25  Link (Always Memorial Day Weekend)
Fleet Week: 24-7/1
National African Violet Week: 25-31
National Marina Days: 25-9/7 (From Memorial Day to Labor Day)  Link
*Week of Solidarity With The People of Non-Self-Governing Territories: 25-31
Scripps Spelling Bee Finals: 26-28 (Tues.-Thurs. after Memorial Day)
*Black Single Parents Week: 28-6/3 
Great American Brass Band Week: 28-30? Link
Wound,Ostomy and Continence  Nursing Week: 31-6/2 Link

May 2026 Daily Holidays

*Amtrak Day: 1
*Batman Day: 1 (Also in September)
*Beltane: 1 Link
Buddha Day: 1 Link  (Celebration Date) Note: Historical date is always April 8
*CSS Reboot Day: 1
Day of Vesak: 1 Link  (Traditionally on the Full May Moon)  NOTE: Vesak varies per Buddist country. See the link!
*Discuss Your Wage Day: 1
*Executive Coaching Day: 1
*Global Love Day: 1 Link
*Hug Your Cat Day: 1 (No website. Sponsor Marisa D'Vari, NY)
*International Doodle Dog Day: 1 Link
*International Guerilla Sunflower Gardening Day: 1 Link
International Sauvignon Blanc Day: 1 Link (First Friday)
*International Workers Day: 1  Link 
*Keep Kids Alive! Drive 25 Day: 1
*Law Day: 1
*Lei Day: 1
*Loyalty Day: 1
Martin Z. Mollusk Day: 1 Link  (First Friday)
*May Day: 1
*May One Day: 1
*Mother Goose Day: 1
*National Bubba Day: 1
*National Heatstroke Prevention Day: 1
*National High Potassium Awareness Day: 1
*National Purebred Dog Day: 1 Link
*New Homeowner's Day: 1
*Religious Brothers Day: 1 Link
School Lunch Hero Day: 1 Link (First Friday)
*School Principals' Day: 1
*Silver Star Banner Day: 1 Link
*Skyscraper Day: 1
Space Day: 1 Link (First Friday)
Tuba Day: 1  (First Friday) Link

Bladder Cancer Awareness Day: 2 Link (First Saturday)
Bombshell's Day: 2  (First Saturday) (Victoria's Secret)
Dandelion Day: 2-3  Link
Free Comic Book Day: 2 Link  (First Saturday)
Herb Day: 2 Link (First Saturday) 
 Indigenous Arts Day: 2 ?
International Doodle Dog Day: 2  (First Saturday)
International Female Ride Day: 2 Link (First Saturday)
*International Harry Potter Day: 2
Join Hands Day: 2 Link (First Saturday)
Kentucky Derby: 2 (First Saturday)
Learn To Ride A Bike Day: 2 (First Saturday)
*Life Insurance Day: 2
Mariachi Day: 2  (First Saturday)
National Auctioneers Day: 2 (First Saturday)
National Fitness Day:  2 (First Saturday)
National Homebrew Day: 2 Link  (First Saturday)
National Play Outside Day: 2 Link (First Saturday)
National Scrapbooking Day: 2 (First Saturday)
National Wildfire Community Preparedness Day: 2 Link  (First Saturday)
*Roberts Rule of Order Day: 2
*Scurvy Awareness Day: 2
Start Seeing Monarchs Day: 2 Link (First Saturday)
*U.S. Capitol Police Day: 2
World Naked Gardening Day: 2 Link (First Saturday)
*World Tuna Day: 2

*Garden Meditation Day: 3
International Bereaved Mothers' Day: 3 (First Sunday) Link
International Firefighters Day: 3 (First Sunday)  Link  Link
International Unmothers Day: 3 (First Sunday)
Lemonade Day: 3 Link  (First Sunday)
*Lumpy Rug Day: 3
MayDay for Mutts: 3 Link (First Sunday)
Motorcycle Mass & Blessing of The Bikes Day: 3 (First Sunday)
National Fallen Firefighters Memorial Day: 3-4?  Link 
National Infertility Survival Day: 3 (Sunday before Mother's Day)
*National Special-abled Pets Day: 3 
*National Two Different Colored Shoes Day: 3
*Paranormal Day: 3
*Public Radio Day: 3
Rural Life Sunday: 3 (First Sunday)
*SAN (Storage Area Network) Architect Day: 3 Link
*Sun Day: 3  Link
*Wild Koala Day: 3  Link
World Laughter Day: 3 Link  Link  (First Sunday)
*World Press Freedom Day: 3

Great Lakes Awareness Day: 4 (Monday of the first week)
*Intergalactic Star Wars Day: 4 (May the Fourth Be With You!) Link
*International Respect for Chickens Day: 4  Link
Lag B'Omer: 4-6
Melanoma Monday: 4 (First Monday)
*National Business Broker's Appreciation Day: 4
*National Self-Employed Day: 4 Link
*National Weather Observers Day: 4 Link
*Petite and Proud Day: 4
*World Give Day: 4

*African World Hertitage Day: 5
*Cartoonists Day: 5
*Chanel No. 5 Day: 5
Childhood Depression Awareness Day:5 (First Tuesday)
*Childhood Stroke Awareness Day: 5 Link
*Cinco de Mayo: 5 Link
Foster Care Day: 5 (First Tuesday)
*International Day of The Midwife: 5 Link
*International Roller Derby Day: 5
*National Day of Awareness for Missing and Murdered Indigenous Women aka Red Dress Day: 5 Link 
*National Astronaut Day: 5 Link
National Teacher Day: 5 (First Tuesday of the First Full Week)
Poem on Your Pillow Day: 5 (First Tuesday)
*Revenge of the Fifth (Star Wars Sith): 5 Link
*Silence The Shame Day: 5  Link
*Totally Chipotle Day: 5
World Asthma Day: 5 (First Tuesday)
*World Hand Hygiene Day: 5 Link
*World Portuguese Language Day: 5

 

Great American Grump Out: 6 (First Wednesday)
*International Management Accounting Day: 6
*International Nurses Day: 6
*International Sauvingnon Blanc Day: 6  (Also August 30)
*Joseph Brackett Day: 6
Moms' Equal Pay Day: 6? Link
National Anxiety Disorders Screening Day: 6 (First Wednesday)
National Bike and Roll To School Day: 6  Link (First Wednesday)
National Day to Prevent Teen & Unplanned Pregnancy: 6 Link (First Wednesday)
National (Deaf) Interpreter Day: 6 Link   (First Wednesday)
National Skilled Trades Day: 6 Link (First Wednesday)
*No Diet Day: 6
*No Homework Day: 6 Link
*Nurses Day or National RN Recognition Day: 6  Link Link
Project ACES Day: 6 (First Wednesday)
*Russel Stover Candies Day: 6
School Nurse Day: 6 Link  (Always the Wednesday of School Nurse Week 6-12)


*Beaufort Scale (Wind) Day: 7
*Cosmopolitan Day: 7 (Drink)
*Cystinosis Awareness Day: 7
Data Innovation Day: 7-8 Link
*National Barrier Awareness Day: 7
National Children's Mental Health Awareness Day: 7 (Thursday of First Full Week)
National Day of Prayer: 7 (First Thursday) Link
National Day of Reason: 7 (First Thursday)
*National Design Packaging Day: 7 Link
*Spring Astronomy Day: 7
*Worldwide Day of Genital Autonomy: 7  Link
World Password Day: 7 Link (First Thursday)

 

 

Child Care Provider Day: 8 Link  (Friday before Mother's Day)
Fintastic Friday: Giving Sharks A Voice: 8 (Second Friday)
*Free Trade Day: 8
*International Thalassaemia Day: 8 Link
Military Spouse Appreciation Day: 8 Link  (Friday before Mother's Day)
*National Animal Disaster Preparedness Day: 8 Link
*National Cruelty Free Day: 8
National Public Gardens Day: 8 Link  (Friday Before Mother's Day)
National Provider Appreciation Day: 8 Link (Friday before Mother's Day)
*No Socks Day: 8 Link
*Time of Remembrance & Reconciliation for Those Who Lost Their Lives During The Second World War: 8-9
*Student Nurse Day: 8  Link
*V E Day: 8
*World Ovarian Cancer Day: 8 Link
*World Red Cross / Red Crescent Day: 8

 

*Alphabet Magnet Day: 9  Link
Bereaved Mother's Day: 9 (2nd Saturday)
Birthmother's Day (Saturday before Mother's Day): 9 Link
Cornelia de Lange Syndrome Awareness Day: 9 Link (2nd Saturday)
*Europe Day: 9 Link
*Home Front Heroes Day: 9 Link
Letter Carrier's  Stamp Out Hunger Food Drive Day: 9 Link  (2nd Saturday)
Mother Ocean Day: 9 (Saturday Before Mother's Day)
National Archery Day: 9  Link  (Second Saturday)
National Babysitters Day: 9 (Saturday before Mother's Day)
National Dog Mom's Day: 9 (Saturday before Mother's Day)
National Miniature Golf Day: 9 (Second Saturday)
*National Moscato Day: 9
*National Sleepover Day: 9 Link
National Train Day: 9 (Saturday closest to the 10th.)
National Windmill Day: 9 (Second Saturday)
O. Henry Pun-off Day: 9 Link
Stay Up All Night: 9 (Second Saturday)
World Belly Dance Day: 9 (Second Saturday)
World Fair Trade Day: 9 (Second Saturday)
World Migratory Bird Day: 9 (Second Saturday) Link
World Scotch Pie Day: 9  Link (moved from January)
World Textile Day: 9 Link  (Second Saturday)

*Clean Your Room Day: 10 Link
*Dia De La Madre: 10
*Hostess Cupcake Day: 10 Link
*International Day of Argania:  10
Mother's Day: 10
Mother's At The Wall Day: 10 (Always Mother's Day)
*National Hamster Day: 10 Link
*National Lipid Day: 10 (Dyslipidemia)  Note: Different than one on Sept. 24)
Rogation Sunday or Rural Life Sunday: 10  (5th Sunday After Easter)
*World Lupus Day: 10

 

*Eat What You Want Day: 11 Link
Hoarding Awareness Day: 11 Link (Second Monday)
*National Foam Rolling Day: 11 Link (Massage)
National Women's Check-up Day: 11 Link (Second Monday)
 

 
*Fibromyalgia Awareness Day: 12 Link
*International Awareness Day for Chronic Immunological and Neurological Diseases: 12  Link
*International Day of Plant Health: 12
*International Nurses Day: 12 Link   Link
*Limerick Day: 12
*ME/CFS International Mother's Day: 12 Link Link
*Root Canal Awareness Day: 12
*National Nutty Fudge Day: 12 Link
*Fibromyalgia Awareness Day: May 12 Link
*National Saphire Segulah Day: 12 Link
*Native American Rights Day: 12
*Odometer Day: 12


*American Indian Day: 13 Link
*Children of Fallen Patriots Day: 13
*Crouton Day: 13
Donate A Day's Wages To Charity: 13 (Second Wednesday)
*Frog Jumping Day: 13
*Hummus Day: 13  Link
*Indigenous Arts Day: 13
*National Crouton Day: 13 Link
National Night Shift Workers Day: 13 (Second Wednesday)
National Third Shift Workers Day: 13 (Second Wednesday)
Receptionists Day: 13 (Second Wednesday)
Root Canal Appreciation Day: 13 (Second Wednesday)
*World Cocktail Day: 13 
World Facilities Management Day: 13 Link (Second Wednesday)

*Apraxia Awareness Day: 14 Link
*National Chicken Dance Day: 14 Link
*National Decency Day: 14 Link Link
*The Stars and Stripes Forever Day: 14
*Underground America Day: 14
*WAAC Birthday: 14

Endangered Species Day: 15 Link  (Third Friday)
*Hyperemisis Gravidarum Awareness Day: 15
*International Day of Families: 15
International Defense Transportation Day: 15 (Third Friday)
*International Kangaroo Care Awareness Day: 15 Link
*International MPS Awareness Day: 15  Link
International Virtual Assistants Day: 15 (Third Friday)
Morel Mushroom Day: 15-17 (Weekend After Mother's Day)
*Nakba Day: 15
NASCAR Day: 15 (Third Friday) (Also October 4)
*National Chocolate Chip Day: 15 Link
*National Slider Day: 15  (Food)
*Nylon Stockings Day: 15
National Bike to Work Day: 15 Link   (Third Friday) 
National Pizza Party Day: 15 (Third Friday)  Link
*National Trauma Survivors Day: 15
*National Tuberous Sclerosis Day: 15  Link
*Peace Officer Memorial Day: 15 Link  Link
*Straw Hat Day: 15  Link
Walk Safely To School Day: 15 Link
World Eel Day: 15 (Third Friday)
*World Orthodontic Health Day: Link

Armed Forces Day: 16 (Third Saturday) 
*Biographer's Day: 16
California Strawberry Day: 16 Link (Third Saturday)
Do Dah Day: 17 Link  (Third Saturday)
*Honor Our LGBT Elders' Day: 16  Link
*International Day of Light: 16  Link
*International Day of Living in Peace: 16  Link
International Heritage Breeds Day: 16 Link  (Third Saturday)
International Learn To Swim Day: 16 (Third Saturday)
National Auctioneers Day: 16 (Third Saturday)
*Mimosa Day: 16 (Drink)
*National BBQ Day: 16 Link
*National Piercing Day: 16
*National Sea Monkey Day: 16
Preakness: 16 (Third Saturday) 
World Fiddle Day: 16 Link (Third Satuday)

Bay to Breakers Race: 17 Link  Note: Oldest Footrace in America!  (Third Sunday in May)
*Graduation Tassel Day: 17 Link
*International Day Against Homophobia, Transphobia and Biphobia: 17  Link
*National Walnut Day: 17 Link
*Pinot Grigio Day: 17 Link
Ride A Unicycle Day: 17 (Third Sunday)
Rural Life Sunday: 17 (Third Sunday) Note: Soil Stewardship Sunday
*Same Sex Marriage Day: 17
Stepmother's Day: 17 Link (Sunday after Mother's Day)
Take Your Parents To The Playground (Park) Day: 17 Link (Third Sunday)
*Syttende Mai: 17
*World Hypertension Day: 17  Link
*World Telecommunications and Information Society Day: 17  Link
*World Neurofibromatosis Day (NF Day): 17  Link

 

*Buy A Musical Instrument Day: 18 Link  (Honor of The Music Man Creator)
CSCMP's Supply Chain Professionals Day: 18 (Third Monday)
*Federal Tech Day: 18 Link
*HIV Vaccine Awareness Day: 18 Link
*I Love Reeses Day: 18 Link  Link
*International Museum Day: 18 Link
*Mother Whistler Day: 18
*National Speech Pathologist Day: Link
*Send An Electronic Greeting Card Day: 18 Link
Supply Chain Professional Day: 18 (Third Monday)
Victoria Day: 18 Link
*Visit Your Relatives Day: 18

 

*Accounting Day: 19 Link  (also October 19) Link
*Boys Club Day: 19
*Hepatitus Testing Day: 19
*May Ray Day: 19
*National Asian & Pacific Islander HIV/AIDS Awareness Day: 19 Link
*National Hepatitus Testing Day: 19
*National Scooter Day: 19
*World IBD Day: 19 Link

 

*Blue Jeans Day: 20
*Eliza Doolittle Day: 20
EMS Day: 20 (Wednesday of EMS Week)   Link
Emergency Medical Services for Children Day: 20 Link (Wednesday of EMS Wk) Link  Link Link
*Everybody Draw Mohammed Day: 20 Link
*International Human Resources Day: 20 Link
*International Red Sneakers Day: 20  Link
*National Association of Psychometrist's Day: 20 Link
National Employee Health & Fitness Day: 20 Link (Third Wednesday)
National Juice Slush Day: 20 (Third Wednesday)  Link
*National Rescue Dog Day: 20  Link
*National Streaming Day: 20 Link
*Reduce Your Lawn Day: 20
Turn Beauty Inside Out Day: 20 (Third Wednesday)
*Weights & Measures Day: 20
*World Autoimmune/Autoinflammatory Arthritis Day (World AiArthritis Day) 20 Link
*World Bee Day: 20 Link Link Link Link Link  Link
*World Metrology Day: 20

 
*American Red Cross Founder's Day: 21
Eat More Fruits & Vegetables Day: 21 (Thursday before Memorial Day) Link
*End of the World or Rapture Party Day: 21 (Prediction)  Link
GAAD Day (Global Accessibility Awareness Day): 21 Link  (Third Thursday)
*I Need A Patch For That Day: 21 Link
International Chardonnay Day: 21 Link (Thursday before Memorial Day)
*International Tea Day: 21  Link
*National Memo Day: 21
*National Waitstaff Day: 21
Shavout: 21 (Sundown)
*Sister Maria Hummel Day: 21
*World Chardonnay Day: 21 Link
*World Day for Cultural Diversity for Dialogue & Development: 21

 

*Canadian Immigrants Day: 22
Don't Fry Day: 22 (Friday Before Memorial Day) Link
*Harvey Milk Day: 22
*International Being You Day: 22 Link
*International Day for Biological Diversity: 22
National Cooler Day: 22 (Friday Before Memorial Day) Link
*National Craft Distillery Day: 22 Link
*National Maritime Day: 22
National Polka Day: 22-24 Link (Always Memorial Day weekend)
National Road Trip Day: 22 (Friday Before Memorial Day Weekend) 
National Title Track Day: 22 (Fourth Friday)
National Wig Out Day: 22 (Always Fri. before Memorial Day)
*NF2 Awareness Day: 22 Link
*Sherlock Holmes Day: 22  Link
*US Colored Troops Day: 22 
*World Goth Day: 22 Link  Link  
*World Paloma Day: 22 Link




Amateur Radio Military Appreciation Day (ARMAD): 23 Link  (Saturday of Memorial Day Weekend)
*International Day to End Obstetric Fistula: 23
*International World Turtle Day: 23
Julia Pierpont Day: 23 (Fourth Saturday)
*National Best Friend-in-Law Day: 23
National Learn To Swim Day: 23 (Saturday of Week Before Memorial Day) Link
*National Medical Coders Day: 23 Link
*National Taffy Day: 23 Link
*World Turtle Day: 23

 

*Aviation Maintenance Technician Day: 24  Link
*Brother's Day: 24  Link
Declaration of the Bab Day: 24
Indianapolis 500: 24 (Sunday of Memorial Day Weekend) 
*International Tiara Day: 24
*Morse Code Day: 24 (Some also observe on April 27)
Neighbor Day: 24 (Sunday before Memorial Day Weekend)
Pentecost: 24 (7th Sunday after Easter)
*Scavenger Hunt and Treasure Hunt Day: 24 Link
WhitSunday: 24 (Same as Pentecost)
*World Schizophrenia Awareness Day: 24 Link
*Yucatan Shrimp Day: 24 Link

 

*Cookie Monster's Birthday: 25  Link  (See also November 2)
Hamburger Day: 25 Link (Always Memorial Day)
*International Plastic Free Day: 25 Link
Memorial Day: 25 (Observed)
*National Brown Bag-it Day: 25 Link (Note: Paper Bag Day is 7/12)
*National and International Missing Children's Day: 25  Link
National Marina Day: 25-9/7 Link (Starts on Memorial Day thru Labor Day)
*National Tap Dance Day: 25
*National Wine Day: 25 Link
*Nerd Pride Day or Geek Pride Day: 25 Link
Prayer for Peace Memorial Day: 25
*Towel Day: 25 Link
*World Fish Migration Day: 25
*World Football Day: 25
*World Thyroid Day: 25  Link

 
Eid-Al-Adha: 26
*National Chardonnay Day: 26 Link
*National Paper Airplane Day: 26 Link Link Link Link
Women's Golf Day: 26-6/2  Link
*World Lindy Hop Day: 26

*Cellophane Tape Day: 27
*Joe Cool Day: 27 Link
National Senior Health & Fitness Day: 27 Link  (Last Wednesday)
World Otter Day: 27 (Last Wednesday)

 
*Amnesty International Founders Day: 28
*Menstrual Hygiene Day: 28 Link
*National Brisket Day: 28 Link
*Sierra Club Day: 28 Link
*Slugs Return From Capistrano Day: 28 Link
Stop The Bleed Day: 28 Link (Fourth Thursday)
*U.S. Border Patrol Day: 28  Link Link Link Link Link Link Link

Ascension of Baha'U'llah: 29
Heat Awareness Day: 29 Link (Last Friday)
*International Day of United Nations Peacekeepers: 29
*Learn About Composting Day: 29
Mike,The Headless Chicken Day: 29-30? Link Link
*National 529 Day: 29  Link
*National Alligator Day: 29
*Put A Pillow On Your Fridge Day: 29 Link

*Indianapolis 500 Anniversary: 30
*International Day of the Potato: 30
*Loomis Day: 30
*Memorial Day (Traditional): 30
*National Creativity Day: 30  Link Link
*World MS Day (Multiple Sclerosis): 30 Link 

*National Smile Day: 31 (Middle of Smile Month 5/15 - 6/15) Link
*Necrotizing Fasciitis Awareness Day:31  Link
*Save Your Hearing Day: 31 Link
*What You Think Upon Grows Day: 31
*World No-Tobacco Day: 31
*World Parrot Day: 31 Link Link