300+ Ideas for Your Content Campaigns in September 2025

To create an email campaign, you should consider a lot of factors: come up with a creative design, prepare offers, build the right segments, configure product recommendations, etc. September emails are no exception.

When the back-to-school season is over but it's still too early to start with Thanksgiving, marketers need to look for other opportunities to connect with customers and keep the conversation going. And although September may look like not the reachest month for content campaign occasions, there is actually plenty of reasons to reach out.

Below are the worth-attention reasons to remind your customers of your business, share some pleasant offers or just deliver a humorous piece of content to cheer them up:

• Customers’ birthday;
• Your company’s birthday;
• International and local holidays;
• Anniversaries;
• Sports events, like championships, marathons, races, etc.;
• Birthdays of famous people;
• Invention dates;
• Historical events;
• Festivals and parades.

Universal Email Content Ideas

There are different kinds of events: international, national, local, typical of a particular region or continent. An international brand should know that not all of them are celebrated around the world: people in China may not know about La Tomatina - a food fight festival organized in Spain every year. On the other hand, not many Spanish are aware of Dragon Boat Festival held in China annually over 2,000 years.

However, even if your audience isn’t familiar with this or that event, it won’t hurt if you introduce them to your subscribers. Just make sure you pick up the right email marketing content applicable to your business. For example:

• Stylish celebrities’ birthdays deserve a mention in campaigns by clothing, jewellery, perfume, or beauty companies;

• World championships, motor racing, and different tournaments can be a good reason for sports gear, nutrition supplement, gym equipment and even insurance companies to get in touch;

• International and national coffee, bakery, chocolate and any other sweet days look as if they were specially designed for coffee shops, confectioneries and bakery magazines.

• Any event dedicated to eco-friendly activities is a good opportunity to remind your customers that you contribute to nature conservation as well (of course, in case you really do).

• If there is a special day dedicated to the kind of product or service you provide, don’t miss a chance to come up with a specially-designed campaign.

• Your customers’ birthday is an event you simply can’t leave unnoticed. Pleasant gifts, warm wishes and festive images are more than welcome.

• Your company’s birthday also makes a good email marketing idea. Tell your story, boast a bit of your recent achievements, introduce new products or reveal plans for the future - it’s your birthday and it’s up to you to pick up the content you want to share.

Day Holidays and Events to Look for in September 2025

Now let's move from the general calendar to particular September email ideas. You definitely don't need to use all of them, but I'm sure you'll find in the list the event resonating with your brand. Some of the events are specific and local, however, they are still great opportunities to get in touch with your subscribers. For example, Eat an Extra Dessert Day sounds like a good occasion for providing an extra discount, especially if you have a catering business or sell kitchen appliances. So, take a look at other email marketing content ideas to include in your welcome campaigns, reactivation emails, or newsletters, and take your email marketing to a whole new level.

September 1:

• Back to School Day
• Knowledge Day
• Disaster Prevention Day (Japan)
• Journalist Day (Taiwan);
• Random Acts of Kindness Day (New Zealand)
• Wattle Day (Australia)
• National Chicken Boy's Day (United States)
• Ginger Cat Appreciation Day (United States)
• No Rhyme or Reason Day (United States)
• Building and Code Staff Appreciation Day (United States)
• Gloria Estefan (Singer) Birthday
• Lily Tomlin (Actress) Birthday

September 2:

• Independence Day (Vietnam)
• Blueberry Popsicle Day (United States)
• World Coconut Day
• V-J Day (United States)
• Vietnam War Veterans Day (United States)
• Notaries Day (Ukraine)
• Democracy Day (Tibet)
• Keanu Reeves (Actor) Birthday
• Salma Hayek (Actress) Birthday
   

September 3:

• Skyscraper Day (United States)
• Merchant Navy Day (United Kingdom)
• National Welsh Rarebit Day (United States)
• Flag Day (Australia)
• San Marino Founders Day (San Marino)
• U.S. Bowling League Day
• Charlie Sheen (Actor) Birthday

September 4:

• Macadamia Nut Day (United States)
• Newspaper Carrier Day (Canada)
• National Wildlife Day (United States)
• International Taekwondo Day
• Custom's Service Worker's Day (Moldova)
• Rescuer's Day (Armenia)
• Eat an Extra Dessert Day (United States)
• Beyoncé (Singer) Birthday

September 5:

• National Lazy Mom's Day (United States)
• Art Break Day (first Friday in September)
• Amazon Day (Brazil)
• International Day of Charity
• Cheese Pizza Day (United States)
• National Be Late for Something Day (United States)
• Jury Rights Day (United States)
• Samosa Day
• Teacher's Day (India)
• Freddie Mercury (Singer) Birthday
• Raúl González Blanco (Footballer) Birthday
   

September 6:

• Read a Book Day
• World Beard Day
• Defence Day (Pakistan)
• Unification Day (Bulgaria)
• Coffee Ice Cream Day (United States)
• Skirt Day (Netherlands)
• Fight Procrastination Day
• Children's Day (Nepal)

September 7:

• Victory Day (Mozambique)
• Father's Day (Australia, New Zealand)
• National Threatened Species Day (Australia)
• Independence Day (Brazil)
• National Beer Lover's Day (United States)
• National Salami Day (United States)
• Google Commemoration Day (United States)
• Chrissie Hynde (Musician) Birthday
• Eazy-E (Rapper) Birthday
• National Grandparents Day (United States, Canada)
• International Day of Clean Air for Blue Skies

September 8:

• International Literacy Day
• World Physical Therapy Day
• National Day (Andorra)
• Virgin Mary's Birthday (Various Catholic countries)
• International Ampersand Day
• Star Trek Day
• Day of the Spanish Aid Worker (Spain)
• Pardon Day (United States)
• Pink (Singer) Birthday
   

September 9:

• Teddy Bear Day
• Emergency Services Day (United Kingdom)
• Chrysanthemum Day (Japan)
• Wienerschnitzel Day (United States)
• Wonderful Weirdos Day (United States)
• International Beauty Day
• International Sudoku Day
• Children's Day (Costa Rica)
• Adam Sandler (Actor) Birthday
• Hugh Grant (Actor) Birthday
   

September 10:

• World Suicide Prevention Day
• Teacher's Day (China)
• National TV Dinner Day (United States)
• Swap Ideas Day (United States)
• National Hug Your Hound Day (United States)
• Positive Thinking Day
• Gibraltar National Day
• Children's Day (Honduras)

September 11:

• Patriot Day (United States)
• National Emergency Number Day (United States)
• Catalonia National Day (Catalonia, Spain)
• Ethiopian New Year (Ethiopia)
• National Hot Cross Bun Day (United States)
• National Make Your Bed Day (United States)
• Moby (Musician) Birthday

September 12:

• National Day (Cape Verde)
• Chocolate Milkshake Day (United States)
• National Video Games Day (United States)
• National Day of Encouragement (United States)
• National Police Woman Day (United States)

September 13:

• World First Aid Day
• International Chocolate Day
• Roald Dahl Day (United Kingdom)
• National Celiac Disease Awareness Day (United States)
• National Bald-Headed Men's Day (United States)
• National Peanut Day (United States)
• National Kids Take Over the Kitchen Day (United States)
• National Defy Superstition Day (United States)
• National Cachaça Day (Brazil)
• Programmer Day
• Scooby-Doo’s Birthday

September 14:

• Exaltation of the Holy Cross (Christianity)
• National Pet Memorial Day (United States)
• Grandparent's Day (Estonia, Philippines)
• National Hindi Day (India)
• National Cream-Filled Donut Day (United States)
• Eat a Hoagie Day (United States)
• Fjord Day (Denmark)

September 15:

• International Day of Democracy
• National Online Learning Day (United States)
• Engineer's Day (India, Romania)
• Independence Day (Belize)
• International Day of Radiant Peace
• National Linguine Day (United States)
• World Lymphoma Awareness Day
• International Dot Day
• Make a Hat Day (United States)
• Respect for the Aged Day (Japan)
• Battle of Britain Day (United Kingdom)
• Cry of Dolores (Mexico)
• Prince Harry (British Royal) Birthday
• Agatha Christie (Author) Birthday

September 16:

• Independence Day (Papua New Guinea, Mexico)
• International Day for the Preservation of the Ozone Layer
• Malaysian Day (Malaysia)
• Guacamole Day
• Mayflower Day (United States)
• Collect Rocks Day (United States)
• International Play-Doh Day
• Flo Rida (Rapper) Birthday
• Juliet’s birthday in Verona

September 17:

• Constitution Day (United States)
• Citizenship Day (United States)
• Heroes' Day (Angola)
• National Monte Cristo Day (United States)
• National Apple Dumpling Day (United States)
• International Country Music Day
• Rescuer's Day (Ukraine)
• Teacher's Day (Honduras)
• International Patient Safety Day
• World Parks Day

September 18:

• National Cheeseburger Day (United States)
• International Read an eBook Day
• World Water Monitoring Day
• National HIV/AIDS and Aging Awareness Day (United States)
• Independence Day (Chile)
• Navy Day (Croatia)
• Rice Krispie Treat Day (United States)
• Greta Garbo‘s Birthday

September 19:

• International Talk Like a Pirate Day
• National Butterscotch Pudding Day (United States)
• Armed Forces Day (Chile)
• Anniversary of the First Emoticon
• Big Whopper Liar Day (United Kingdom)
• National POW/MIA Recognition Day (United States)

September 20:

• National Punch Day (United States)
• Batman Day (United States)
• National Gymnastics Day (United States)
• Oktoberfest begins (Germany)
• International Red Panda Day
• International Eat an Apple Day
• Pharmaceutical Worker's Day (Ukraine)
• International Day of University Sport
• National Pepperoni Pizza Day (United States)
• National Queso Day (United States)
• Sophia Loren (Actress) Birthday
• Jon Bernthal (Actor) Birthday

September 21:

• International Day of Peace
• Miniature Golf Day (United States)
• Independence Day (Belize)
• National Quiet Day (United Kingdom)
• International Day of Radiant Peace
• World Gratitude Day
• Zero Emissions Day
• Arbor Day (Brazil)
• Stephen King’s Birthday

September 22:

• National White Chocolate Day (United States)
• National Elephant Appreciation Day (United States)
• Hobbit Day
• World Car-Free Day
• Ice Cream Cone Day
• Business Women's Day (United States)
• Tom Felton (Actor) Birthday

September 23:

• International Day of Sign Languages
• Autumnal Equinox Day (Japan)
• Celebrate Bisexuality Day
• National Great American Pot Pie Day (United States)
• National Teal Talk Day (United States)
• National Day (Saudi Arabia)
• Teachers' Day (Brunei)
• Checkers Day (United States)
• Julio Iglesias (Singer) Birthday

September 24:

• National Cherries Jubilee Day (United States)
• National Bluebird of Happiness Day (United States)
• National Punctuation Day (United States)
• National Braeburn Apple Day (United States)
• Honda Motor Company Foundation Day
• National Horchata Day (United States)

September 25:

• National Comic Book Day
• National Lobster Day (United States)
• National One-Hit Wonder Day (United States)
• World Pharmacists Day
• National Psychotherapy Day
• National Cooking Day (United States)
• Will Smith (Actor) Birthday
• Michael Douglas (Actor) Birthday
• Catherine Zeta-Jones (Actress) Birthday

September 26:

• European Day of Languages
• World Environmental Health Day
• National Pancake Day (United States)
• World Contraception Day
• Ask a Stupid Question Day (United States)
• World's Biggest Coffee Morning (United Kingdom)
• Serena Williams (Tennis Player) Birthday

September 27:

• World Tourism Day
• International Rabbit Day
• National Public Lands Day (United States)
• Crush a Can Day (United States)
• Google Commemoration Day (United States)
• Ancestor Appreciation Day
• National Chocolate Milk Day (United States)
• Avril Lavigne (Singer) Birthday
• Gwyneth Paltrow (Actress) Birthday

September 28:

• National Drink Beer Day (United States)
• International Day of the Deaf
• National Good Neighbor Day (United States)
• World Rivers Day (last Sunday in September)
• International Right to Know Day
• World Rabies Day
• Freedom from Hunger Day
• Czech Statehood Day
• Confucius' Birthday
• Brigitte Bardot (Actress) Birthday

September 29:

• World Heart Day
• Goose Day (United Kingdom)
• Inventors' Day (Argentina)
• Firefighter's Day (Iran)
• National Coffee Day (United States)
• Halsey (Singer) Birthday

September 30:

• International Translation Day
• International Podcast Day
• Orange Shirt Day (Canada)
• International Day of Older Persons
• Botswana Day (Botswana)
• Day of Libraries (Ukraine)
• Adoption Day (Ukraine)
• Hot Mulled Cider Day (United States)
• Monica Bellucci’s Birthday
• Truman Capote (Author) Birthday

With this short guide, you won’t rack your brains looking for September email marketing ideas. I’ve listed over 300 content ideas, but hope you know that creativity knows no limits. Take your time and explore for new quirky ideas and opportunities to engage with your subscribers. Also, make sure to check the date of a particular event as they may differ for various countries and even for various regions within one country. And follow our blog for more inspiring email ideas: October is coming. By the way, feel free to share in comments your own thoughts on how to spice up fall email campaigns. Visuals are also more than welcome.