- Allergy/Asthma Awareness Month
- Arthritis Month
- Asian/Pacific American Heritage Month
- Awareness of Medical Orphans Month
- Barbecue Month
- Better Hearing and Speech Month
- Bike Month
- Blood Pressure Month
- Business Image Improvement Month (International)
- Canavan Disease Month
- Civility Month (International)
- Creative Beginnings Month
- Date Your Mate Month
- Eco-driving Month
- Egg Month
- Family Month
- Family Wellness Month
- Fibromyalgia Education and Awareness Month
- Foster Care Month
- Freedom Shrine Month
- Get Caught Reading Month
- Gifts from the Garden Month
- Good Car-Keeping Month
- Hamburger Month
- Haitian Heritage Month
- Heal the Children Month
- Healthy Vision Month
- Hepatitis Awareness Month
- Home Schooling Awareness Month
- Huntington’s Disease Awareness Month
- Internal Audit Awareness Month (International)
- Inventors Month
- Jewish American Heritage Month
- Latino Books Month
- Lupus Awareness Month
- Lyme Disease Awareness Month
- Meditation Month
- Mediterranean Diet Month
- Melanoma/Skin Cancer Detection and Prevention Month
- Mental Health Month
- Military Appreciation Month
- Motorcycle Safety Month
- Moving Month
- Necrotizing Fasciitis Awareness Month
- Neurofibromatosis (NF) Awareness Month
- Older Americans Month
- Osteoporosis Awareness and Prevention Month
- Personal History Month
- Pet Month
- Pet Cancer Awareness Month
- Photograph (Photo) Month
- Physical Fitness & Sports Month
- Physiotherapy Month
- Prader-Willi Syndrome Awareness Month
- Preeclampsia Awareness Month
- Prepare Tomorrow’s Parents Month
- Preservation Month
- Ramadan
- React Month
- Recommitment Month
- Revise Your Work Schedule Month
- Salad Month
- Salsa Month (The Condiment)
- Service Dog Eye Examination Month
- Skin Cancer Awareness Month
- Smile Month
- Social Security Education Awareness Month
- Spiritual Literacy Month
- Strike Out Strokes Month
- Stroke Awareness Month
- Sturge-Weber Awareness Month
- Sweet Vidalia Onion Month
- Syringomyelia Awareness Month
- Tay-Sachs Disease Month
- Teen CEO Month
- Teen Self-Esteem Month
- Tennis Month
- Textile Month
- Tourettes Syndrome Awareness Month
- Toxic Encephalopathy and Chemical Injury Awareness Month
- Tuberous Sclerosis Month
- Ultra-violet Awareness Month
- Victorious Woman Month (International)
- Vinegar Month
- Water Safety Month
- Women’s Health Care Month
- Young Achiever’s/Leaders of Tomorrow Month
- Youth Traffic Safety Month
May
May Daily Holidays
May Weekly Holidays