| 5-A-Day Month | |
| Adult Immunization Awareness Week | September 20-26 |
| AKC Responsible Dog Ownership Month | |
| Alcohol and Drug Addiction Recovery Month, Natl | |
| Animal Remembrance Month, World | |
| Atrial Fibrillation Month | |
| Attention Deficit Hyperactivity Disorder Month | |
| Baby Safety Month | |
| Backpack Safety America Month | |
| Banned Books Week | Sept 25-Oct 2 |
| Be Kind To Editors and Writers Month | |
| Campus Safety Month | |
| Chicken Month, Natl | |
| Child Passenger Safety Week | September 19-25 |
| Childhood Cancer Awareness Month | |
| Childhood Injury Prevention Week | September 1-7 |
| Children’s Eye Health And Safety Month | |
| Children’s Good Manners Month | |
| Cholesterol Education Month | |
| College Savings Month | |
| Constitution Week | September 17-23 |
| Coupon Month, Natl | |
| Craniofacial Acceptance Month | |
| Deaf Awareness Week | September 19-25 |
| DNA, Genomics and Stem Cell Education and Awareness Month, Natl | |
| Emergency Preparedness Week | September 11-17 |
| Fall Hat Month | |
| Farm Safety and Health Week | September 19-25 |
| Food Safety Education Month | |
| Go Wild During California Wild Rice Month | |
| Grandparents Day | 12-Sep |
| Gynecologic Cancer Awareness Month | |
| Gynecological Cancer Awareness Month | |
| Head Lice Prevention Month, Natl | |
| Healthcare Environmental Services Week | September 5-11 |
| Healthy Aging Month | |
| Hispanic Heritage Month | Sep 15-Oct 15 |
| Honey Month, Natl | |
| Infant Mortality Awareness Month | |
| International Ataxia Awareness Day | 25-Sep |
| International Housekeepers Week | September 12-18 |
| International Literacy Day | 8-Sep |
| Labor Day | 6-Sep |
| Leukemia, Lymphoma, Myeloma Awareness Month | |
| Library Card Sign-Up Month | |
| Menopause Awareness Month | |
| Mold Awareness Month | |
| Mushroom Month, Natl | |
| National Day of Prayer and Remembrance for the Victims of Hurricane Katrina | 16-Sep |
| One-on-One Month | |
| Organic Harvest Month | |
| Ovarian Cancer Awareness Month, Natl | |
| Patriot Day | 11-Sep |
| Pediculosis Prevention Month | |
| People Skills Month, Intl | |
| Piano Month, Natl | |
| Preparedness Month, Natl | |
| Project AWARE Month (Marine Conservation) | |
| Prosperity Creation Month | |
| Prostate Cancer Awareness Month | |
| Prostate Cancer Awareness Week | September 19-25 |
| Rehabilitation Awareness Week | September 21-27 |
| Reunion Planning Month | |
| Reye's Syndrome Awareness Week | September 19-25 |
| Rice Month, Natl | |
| Rosh Hashanah | September 9-10 |
| School Success Month | |
| Sea Cadet Month | |
| Self-Awareness Month, Intl | |
| Self-Improvement Month | |
| Shameless Promotion Month | |
| Sickle Cell Awareness Month | |
| Skin Care Awareness Month, Natl | |
| Sneakers at Work Day | 17-Sep |
| Sports and Home Eye Safety Month | |
| Strategic Thinking Month, Intl | |
| Subliminal Communications Month | |
| Substitute Teacher Appreciation Week | September 14-20 |
| Suicide Prevention Week | September 5-11 |
| Sukkot | September 23-29 |
| Surgical Technologists Week | September 20-26 |
| Update Your Resume Month | |
| Vegan Month | |
| Women's Friendship Month | |
| World Alzheimer’s Day | 21-Sep |
| World Heart Day | 26-Sep |