| Sep 1 | 🇺🇸 Labor Day • 🤷 No Rhyme Nor Reason Day |
| Sep 2 | 🎖️ V‑J Day • 💪 Live Fearless Day |
| Sep 3 | 🏙️ National Skyscraper Day • 🥥 World Coconut Day |
| Sep 4 | 🐾 Wildlife Day • 🌰 Macadamia Nut Day |
| Sep 5 | 🍕 Cheese Pizza Day • 🕒 Be Late for Something Day |
| Sep 6 | 📖 Read a Book Day • 🐢 Fight Procrastination Day |
| Sep 7 | 👵👴 Grandparents Day • 🥩 Salami Day |
| Sep 8 | 🧒 FL Missing Children’s Day • 🙏 Pardon Day |
| Sep 9 | 🔢 Sudoku Day • 🧸 Teddy Bear Day |
| Sep 10 | 🕯️ Patriot Day • 🍽️ TV Dinner Day |
| Sep 11 | 🇺🇸 Patriot Day (observed) • 🛏️ Make Your Bed Day |
| Sep 12 | 🥤 Chocolate Milkshake Day |
| Sep 13 | 👩🍳 Kids Take Over Kitchen Day • 🌞 Positive Thinking Day |
| Sep 14 | 🍩 Cream‑Filled Donut Day • 🐶 Hug Your Hound Day |
| Sep 15 | 🇲🇽 Start Hispanic Heritage Month • 🎩 Make a Hat Day |
| Sep 16 | 🥑 Guacamole Day • 🪨 Collect Rocks Day |
| Sep 17 | 📜 Constitution Day • 🎻 Country Music Day |
| Sep 18 | 🍔 Cheeseburger Day • 🍘 Rice Krispie Treat Day |
| Sep 19 | 🏴☠️ Talk Like a Pirate Day • 🤸 Gymnastics Day |
| Sep 20 | 🥊 Punch Day • 🧹 Cleanup Day |
| Sep 21 | ⛳ Miniature Golf Day • ☮️ Peace Day |
| Sep 22 | 🧙 Hobbit Day • 🍂 Autumnal Equinox begins |
| Sep 23 | ♟️ Checkers Day • 👼 Angels in Politics Day |
| Sep 24 | ✍️ Punctuation Day • 🍒 Cherries Jubilee Day |
| Sep 25 | 🦞 Lobster Day • 📚 Comic Book Day |
| Sep 26 | 🥣 Hurricane Helene (2024) • 🍏 Johnny Appleseed Day |
| Sep 27 | 🍫 Chocolate Milk Day • 🛌 Breakfast in Bed Day |
| Sep 28 | 🤔 Ask a Stupid Question Day • 🧑🤝🧑 Good Neighbor Day |
| Sep 29 | ☕ National Coffee Day |
| Sep 30 | 🍎 Hot Mulled Cider Day |
