“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 / ...

Whether it's a parent, child, sibling, friend, or significant other, a heartfelt prayer or wish can truly make their day. This list offers a variety of options, from short and sweet messages to more ...