It was not until 1972 that Father’s Day became a national holiday in the U.S. This Sunday is a time to thank fathers for doing nice things throughout the year. Maybe your dad gave you a gift, or helped pay for your education. Maybe he picked you up at school or took you on trips around the country. Many American families celebrate Father’s Day by gathering for dinner or organizing a family event. Some children give presents to their fathers. The magazine Men’s Journal suggests that you give dad a nice briefcase, a tool like a hammer or bottle opener, or perhaps a book with directions on how to prepare tasty meals on a barbecue grill. But the holiday is not that serious. So some people decided to have fun on Twitter in honor of Father’s Day. On Friday, the hashtag #PutYourDadInABand started trending. The aim was to use Father’s Day as the inspiration to change a band’s name. One person took the band Mumford and Sons and changed the name into “Mumford and I’m Disappointed in You, Son.”