- Number of holidays
- 19
- Day of the year
- 256
- Days left in the year
- 109
International Chocolate Day marks September 13, 1857, the birthday of Milton Hershey — the Pennsylvania caramel maker who built the first large-scale American milk chocolate manufacturing operation and created a model factory town around it in 1903. Grandparents Day is a U.S. national observance established in 1978 by President Jimmy Carter, observed on the first Sunday after Labor Day to honor grandparents and the role they play in family continuity. Bald is Beautiful Day was created to celebrate male pattern baldness — a hereditary condition affecting approximately 50 percent of men by age 50, driven by dihydrotestosterone — and to challenge the stigma that hair loss carries in cultures where youth and hair are conflated. National Hug Your Hound Day was created to celebrate the human-canine bond and to encourage owners to spend extra physical and emotional quality time with their dogs.
All Holidays On September 13
Grandparents Day
National Peanut Day
Defy Superstition Day
European Heritage Days
German Language Day
International Chocolate Day
National Hug Your Boss Day
National Hug Your Hound Day
National Pet Memorial Day
National Twilighters Day
Positive Thinking Day
Programmers Day
Roald Dahl Day
Supernatural Day
Uncle Sam Day
About September 13
September 13 Q&As
What is the most popular holiday on September 13?
On September 13, Grandparents Day is the most widely observed family holiday in 2026, established by President Carter in 1978. International Chocolate Day is the most globally recognized food observance, marking Milton Hershey’s September 13, 1857 birthday, and Bald is Beautiful Day is the most recognized body-positive observance on the date.
What food holidays are on September 13?
September 13 includes International Chocolate Day, marking Milton Hershey’s September 13, 1857 birthday, and National Celiac Disease Awareness Day, raising awareness for the autoimmune disorder affecting approximately 1 percent of the population globally — for whom chocolate must be certified gluten-free.
What countries celebrate holidays on September 13?
September 13 observances span Czech Republic and Slovakia (Day of the Homeland), Europe (European Heritage Days), and the U.S., which hosts International Chocolate Day, Grandparents Day, Bald is Beautiful Day, and National Hug Your Hound Day. Folic Acid Awareness Week is observed globally.