• Labor Day First Monday of month
• National Indoor Plant Week - third week of month
• Labor Day First Monday of month
• Grandparent's Day - first Sunday after Labor Day
• POW/MIA Recognition Day - Third Friday of September
• National Women's Friendship Day - third Sunday in September
• Wife Appreciation Day - third Sunday in September
• Native American Day - fourth Friday of the month
• International Rabbit Day - Fourth Saturday in September
September 1
• Emma M. Nutt Day, the first woman telephone operator
• National Cherry Popover Day
Septermber 2
• World Coconut Day
• International Bacon Day - Saturday before Labor Day
• VJ Day, WWII
Semptember 3
• Skyscraper Day
September 4
• Newspaper Carrier Day
September 5
• Be Late for Something Day
• Cheese Pizza Day
September 6
• Fight Procrastination Day
• Read a Book Day
September 7
• World Forgiveness Day
• National Salami Day
• Neither Rain nor Snow Day
September 8
• International Literacy Day
• National Date Nut Bread Day
• Pardon Day
September 9
• Teddy Bear Day
September 10
• World Anti-Suicide Day
• National Pet Memorial Day -second Sunday in September
• Sewing Machine Day
• Swap Ideas Day
September 11
• 911 Remembrance
• Eid-Ul-Adha
• Make Your Bed Day
• No News is Good News Day
September 12
• Chocolate Milk Shake Day
• National Video Games Day - also see Video Games Day in July
September 13
• Defy Superstition Day
• Fortune Cookie Day
• National Peanut Day
• Positive Thinking Day
• Uncle Sam Day - his image was first used in 1813
September 14
• World First Aid Day
• National Cream-Filled Donuts Day
September 15
• International Day of Democracy
• International Engineer’s Day
• Make a Hat Day
• Felt Hat Day - On this day, men traditionally put away their felt hats.
September 16
• World Ozone Day
• American Legion Day
• Collect Rocks Day
• Step Family Day
• Mayflower Day
• Mexican Independence Day
• National Play Doh Day
• Working Parents Day
September 17
• Citizenship Day
• Constitution Day
• National Apple Dumpling Day
September 18
• National Cheeseburger Day
September 19
• International Talk Like A Pirate Day
• National Butterscotch Pudding Day
September 20
• National Pepperoni Pizza Day
• National Punch Day
September 21
• World Alzheimer’s Day
• International Peace Day
• Miniature Golf Day
• World Gratitude Day
September 22
• World Cancer Free Day or Rose Day
• Autumn Equinox - Fall begins!
• Business Women's Day
• Elephant Appreciation Day
• Hobbit Day
September 23
• International Day of the Deaf
• Checkers Day
• Dog in Politics Day
September 24
• National Cherries Jubilee Day
September 25
• National Comic Book Day
September 26
• World Contraception Day, european day of languages
• Johnny Appleseed Day
September 27
• World Tourism Day
• Crush a Can Day
September 28
• World Rabies Day
• Ask a Stupid Question Day
• National Good Neighbor Day
September 29
• World Heart Day
• Confucius Day - Try your luck. Get a Fortune Cookie.
September 30
• National Mud Pack Day