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The "Happy Birthday" song was written by two sisters, Patty and Mildred Hill, in the late 19th century. Originally titled "Good Morning to All," the song was first published in a kindergarten songbook in 1893. The lyrics were changed to "Happy Birthday" in the early 1900s and the song became popular for use in birthday celebrations.
The song "Happy Birthday" gained popularity in the early 20th century as people began using it in birthday celebrations. In 1935, it was copyrighted by the Summy Company, which was later acquired by Warner/Chappell Music. This copyright caused the song to be widely used and recognized as the official birthday song.
The longest continuous "Happy Birthday" celebration on record lasted for 35 hours and 35 minutes in 1988. It was organized by a group of people in Toronto, Canada, and involved singing the song repeatedly while taking turns to rest.
Yes, "Happy Birthday" has been translated and sung in many different languages around the world. In fact, the Guinness World Record for the most translated song is held by "Happy Birthday" with translations in over 120 languages.
In 2015, a federal court ruled that the copyright for the "Happy Birthday" song was invalid, making it a public domain song. This means that anyone can use the song without having to pay royalties. However, some people still choose to use alternative birthday songs to avoid any potential legal issues.