Ahoy, mateys! September 19 is Talk Like a Pirate Day. It’s one of about 1,600 special days listed by the creators of the National Day Calendar. They include official holidays—like Labor Day and the Fourth of July—and unexpected ones, like Pepperoni Pizza Day (September 20).
Many people argue that a lot of these made-up holidays are meaningless. Some of them were started by companies just to sell products. But other people say unofficial holidays can be harmless fun. And some, like International Volunteer Day, encourage people to do good deeds.