Mildred J. Hill (1859-1916) was an American composer and pianist, best known for co-creating the iconic children's song "Happy Birthday to You." She composed the music in 1893, with lyrics later added by her sister, Patty Hill, for a kindergarten song titled "Good Morning to All." This melody has since become one of the most recognized tunes globally, often sung at birthday celebrations. Mildred Hill's work primarily falls within the genres of children's music and early American popular music. While "Happy Birthday" is her most notable contribution, she also composed other works, including hymns and educational songs, aimed at enhancing early childhood education. Hill's impact on music is significant; her melody has transcended generations, becoming a cultural staple in birthday celebrations worldwide. The song's simplicity and familiarity have made it a foundational piece in American music, often sparking discussions about copyright and public domain due to its widespread use. Through her contributions, Mildred J. Hill played a crucial role in shaping the landscape of American children's music and remains an enduring figure in music history.