14 Social Media Holiday to Celebrate This September

Summary

The September social media calendar features 14 holidays and events that brands can use to plan content, connect with audiences, and encourage engagement. The list spans World Letter Writing Day, International Day of Charity, Labor Day, International Literacy Day, National Video Games Day, International Equal Pay Day, and International Podcast Day, among others. Each entry pairs its date and hashtag with a suggested angle, such as handwritten letters, employee recognition, literacy infographics, gaming contests, equal-pay advocacy, or sustainable travel destinations. The calendar also includes September 11’s National Day of Service and Remembrance, Hobbit Day, the First Day of Fall, and World Tourism Day, with ideas ranging from commemoration and themed visuals to seasonal recommendations and education. It closes by directing readers to a 2026 social media holiday calendar for further content-planning ideas.

Takeaways

1. 1

   World Letter Writing Day content can evoke nostalgia through interesting facts, handwritten letters, and invitations for audiences to write and share their own letters.

2. 2

   National Video Games Day suggestions include contests, cosplay highlights, and interactive videos designed to create buzz and deepen engagement with gaming communities.

3. 3

   International Equal Pay Day provides an opportunity to use #EqualPayDay, support fair wages, and highlight equal pay’s significance in building a more inclusive workplace.