Why is it National Deep-Dish Pizza Day or National Splurge Day, or maybe National Watermelon Day? Our Planet Money podcast tries to find out who or what is behind all the new strange holidays. Source: [url=http://www.npr.org/2017/04/19/524654665/its-national-garlic-day-who-is-making-up-these-weird-holidays?utm_medium=RSS&utm_campaign=strangenews]It's National Garlic Day. Who Is Making Up These Weird Holidays?[/url]