Believe it or not, Happy Birthday to You is copyrighted and owned by
Time-Warner Communications and will not fall out of copyright until about
2030. I was shocked to learn this, but it is true.
It started out as Good Morning to You, written by the Hill sisters in the 1890s. As a result of a court acgtion in 1935, the words Happy Birthday to You were added to the copyright because of a suit against Ira Gershwin.
Time-Warner does not care, supposedly, about the use of the little ditty at birthday parties, but if it is performed, or used in a movie or television show, or on the radio or, presumably in a podcast, they get testy. 'Royalties for Happy Birthday to You run around $2 million a year.