September Theme Days: Funny, Silly, Offbeat September Theme Days & Holidays
Here’s a list of some of the fun, wacky, offbeat, and not-so-wacky theme days and observances for the month of September, 2025. Celebrating these, recognizing these theme days is a very simple way to bring a little fun and humor into your workplace. For some ideas on how to make use of some of these fun holidays go to: Ways to Celebrate Fun Holidays in the Workplace
September 1
Labour Day
Random Acts of Kindness Day
Burnt Ends Day
Hotel Employees Day
World Letter Writing Day
Executive Toy Testing Day
No Rhyme, No Reason Day
Building and Code Staff Appreciation Day
International Day of Awareness for the Dolphins of Taiji
Yard Art Day
September 2
Thank you, IT Help Desk Day
Another Look Unlimited Day (to see what you can give away to charity)
World Coconut Day
September 3
Cinema Day
Skyscraper Day
Pressed Pennies Day
September 4
Wildlife Day
Spice Blend Day
Newspaper Carriers Day
September 5
Bring Your Manners to Work Day
Cheese Pizza Day
Be Late for Something Day
International Day of Charity
Chianti Day
Lazy Mom’s Day
September 6
Play Outside Day
Tailgating Day
World Beard Day
September 7
Pet Rock Day
Grandparents Day
Bowling League Day
Neither Snow Nor Rain’ Day
Salami Day
Attention Deficit Disorder Awareness Day
International Clean Air Day for Blue Skies
Founding Day for Google
September 8
Boss/Employee Exchange Day
Star Trek Day
Iguana Awareness Day
Dog Walkers Appreciation Day
International Literacy Day
World Physical Therapy Day
Ampersand Day
Oncology Nurses/Pediatric Hematology Day
Pardon Day
September 9
Wonderful Weirdos Day
Opposite Day (to do the opposite of what you’d typically do)
International Buy a Priest a Beer Day
International Box Wine Day
Teddy Bear Day
Ants on a Log Day
September 10
TV Dinner Day
Swap Ideas Day
September 11
Libraries Remember Day
Remember Freedom Day
September 12
Hug and High-Five Day
Cloud Appreciation Day
Encouragement Day
Video Games Day
September 13
Hug Your Boss Day
Blame Someone Else Day
Bald is Beautiful Day
International Chocolate Day
International Programmers Day
Peanut Day
Kids Take Over The Kitchen Day
Scooby-Doo Day
Roald Dahl Day
International Drive Your Studebaker Day
Prairie Day
September 14
Hug Your Hound Day
Live Creative Day
September 15
8-Track Tape Day
Felt Hat Day
Greenpeace Day
International Day of Democracy
International Dot Day
On-line Learning Day
Cheese Toast Day
September 16
Stay Away From Seattle Day
IT Professionals Day
Tattoo Story Day
Guacamole Day
International Day for the Preservation of the Ozone Layer
Play-Doh Day
September 17
International Country Music Day
Monte Cristo Day
Professional House Cleaner’s Day
Time’s Up Day
Table Shuffleboard Day
Responsible Dog Owner Day
Ask an Atheist Day
September 18
Ceiling Fan Day
International Day of Listening
Hug a Greeting Card Writer Day
Cheeseburger Day
Read an Ebook Day
Respect Day
September 19
Talk Like A Pirate Day
September 20
Batman Day
Pepperoni Pizza Day
Dance Day
Locate an Old Friend Day
International Eat an Apple Day
International Red Panda Day
Big Whopper Lie Day
String Cheese Day
Fried Rice Day
September 21
Wife Appreciation Day
International Day of Peace
Chai Day
World Alzheimer’s Day
September 22
Remote Employee Appreciation Day
Dear Diary Day
Elephant Appreciation Day
Chain Mail Day
Hobbit Day
Ice Cream Cone Day
White Chocolate Day
Walk n’ Roll Dog Day
September 23
Dogs in Politics Day
Innergize Day
Snack Stick Day
International Day of Sign Languages
September 24
Punctuation Day
September 25
Math Storytelling Day
One Hit Wonder Day
Quesadilla Day
World Pharmacists Day
Research Administrators Day
Tune-Up Day
Psychotherapy Day
Lobster Day
World Maritime Day
September 26
Save the Koala Day
Hug a Vegan Day
Hug a Vegetarian Day
Forget-Me-Not Day
Situational Awareness Day
Johnny Appleseed Day
Dumpling Day
September 27
Ancestor Appreciation Day
World Tourism Day
Crush a Can Day
International Rabbit Day
Save Your Photos Day
September 28
Drink Beer Day
World Rivers Day
Good Neighbor Day
International Right to Know Day
World Rabies Day
September 29
International Coffee Day
World Heart Day
Biscotti Day
September 30
Ask a Stupid Question Day
International Podcast Day
Love People Day
Mulled Cider Day
International Translation Day
Michael Kerr, 2025. www.HumoratWork.com Michael Kerr is an international business speaker and very funny motivational speaker. Be sure to sign up for the raved about weekly e-zine Humor at Work, to help energize your workplace! He is also the author of The Humor Advantage, The Jerk-Free Workplace, and Hire, Inspire, and Fuel Their Fire.
