Defy Superstition Day
Defy Superstition Day falls on September 13 and invites you to test a few old superstitions, from the number thirteen to black cats, and to learn where those beliefs came from.
September 13
9 holidays
Fortune Cookie Day
Fortune Cookie Day falls on September 13 and celebrates a treat that is American rather than Chinese, with two California claimants to its invention and a Japanese cookie behind the idea.
Hug Your Hound Day
Hug Your Hound Day falls on September 13, asking for a day of attention to your dog, and worth pairing with the awkward fact that most dogs do not enjoy being hugged.
National Grandparents Day
National Grandparents Day falls on the first Sunday after Labor Day, and it was campaigned for by a woman who had noticed who never got visitors.
Peanut Day
Peanut Day falls on September 13, and the testing every peanut crop must pass exists because of an outbreak that killed 100,000 turkeys in 1960.
Positive Thinking Day
Positive Thinking Day falls on September 13, and the research is awkward for it: vividly picturing success tends to reduce the effort people then put in.
Roald Dahl Day
Roald Dahl Day falls on September 13, his birthday, and the books remain wildly popular while their author remains genuinely difficult to defend.
Uncle Sam Day
Uncle Sam Day falls on September 13, and the pointing figure on the famous recruiting poster was adapted from a British one drawn three years earlier.
National Programmer’s Day
National Programmer’s Day falls on the 256th day of the year, a date chosen because 256 is the number of values that fit in a single byte.