but many folks have trouble figuring out what to write in a birthday card other than the obvious 'happy birthday' phrase. Thankfully, finding the right birthday card messages is a piece of cake!

“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 ...

‘Happy Birthday’ was composed by two American sisters, Patty and Mildred J Hill, who wrote the melody in 1893. Patty was a school teacher and Mildred was a pianist and composer. The melody was ...

With her birthday falling on April Fools' Day, she has a tradition of her own to uphold as well. She sends cards out to friends and family, wishing them a happy birthday on April 1, too.