“Happy Birthday” may be the Hill sisters' main claim to fame, but Patty (left) and Mildred's (right) impact on American history extends far beyond the beloved song. Illustration by Meilan Solly / ...

Black Country, New Road are back with another new song from Forever Howlong. The new single, “Happy Birthday,” follows “Besties” and was, in fact, inspired by the preceding track. “When I wrote ‘Happy ...