101 years ago today, on March 4, 1924 (January 29, 1924, the song "Happy Birthday to You" was officially released. "Happy Birthday to You" is a popular song used to celebrate birthdays. According to the Guinness World Records,"Happy Birthday to You" is one of the three most popular songs in the English language, with the other two songs being "Auld Lang Syne" and "He's a Happy Good Fellow". The song was translated into multiple languages, although people often sing the song's English lyrics in some countries where English is not the main language. The melody of "Happy Birthday to You" was written by two American sisters, Patty and Mildred Hill, when they taught at a school in Louisville, Kentucky, USA in 1893. The lyrics of the song were originally used to greet everyone in class and were titled "Good Morning to ALL." The lyrics of "Happy Birthday to You" were copyrighted by Summy Company in 1935, and the copyright will expire in 2030. This is the first copyrighted lyrics. The copyright holding company was acquired by Warner Records in 1990 for $15 million, of which the value of "Happy Birthday to You" was estimated at $5 million. Although the current copyright status of the song is unclear, Warner claims it is technically illegal to perform the song in public without permission unless royalties are paid to them. It's not entirely clear who wrote the lyrics to "Happy Birthday to You".