Rezso Sugar, also known as Rezső Seress, was a Hungarian composer and pianist, born on November 8, 1889, in Budapest. He is best known for his contributions to the genre of popular music, particularly in the realm of Hungarian folk and cabaret music. His most notable work is the song "Gloomy Sunday," composed in 1933, which has been covered by numerous artists, including Billie Holiday, whose rendition helped popularize the song internationally. "Sunday" is often referred to as the "Hungarian Suicide Song" due to the urban legends surrounding its somber themes and supposed connection to suicides. Despite the controversy, the song has had a profound impact on music, influencing various artists across genres and becoming a staple in the repertoire of jazz and blues musicians. Sugar's melancholic style and innovative use of harmonic structures contributed to the evolution of popular music in Hungary and beyond. He passed away on January 11, 1969, leaving behind a legacy that continues to resonate in the music world, highlighting the intersection of folk traditions and modern songwriting.