那對姊妹作或改生日歌?(happy brithday)

Patty Hill & Mildred J. Hill
Also called Louisvile Sisters, because that is where they are from.

In 1893 when they were school teachers in Louisville, Kentucky. The verse was originally intended as a classroom greeting entitled "Good Morning to All". The version as we know it was copyrighted in 1935 by the Summy Company as an arrangement by Preston Ware Orem, and is scheduled to expire in 2030. This was the first known written version to include the lyrics. The company holding the copyright was purchased by Warner Chappell in 1990 for $15 million dollars, with the value of "Happy Birthday" estimated at $5 million.[1] While the current copyright status of the song is unclear, Warner claims that unauthorized public performances of the song are technically illegal unless royalties are paid to them. It is unknown, but speculated upon who wrote the lyrics to "Happy Birthday to You".