The phrase "10월의 어느 멋진 날에" refers to a well-known Korean song titled "10월의 어느 멋진 날에," which translates to "On a Lovely Day in October." This song is originally based on a piece called "Serenade To Spring" by the Norwegian group Secret Garden. The Korean lyrics were newly created by lyricist Han Kyung-hye and the arrangement is by Kim Dong-gyu. Though the original melody symbolizes spring, the Korean version is famous as an autumn-themed song celebrated for its beautiful lyrics and melody. It became popular after its release around 2000 and is often associated with autumn events such as weddings and school performances. Various versions of the sheet music (악보) are available, including piano, guitar, and recorder arrangements, and it is considered a beloved piece in Korean music culture.
The lyrics describe a serene and lovely October day filled with love, happiness, and reflections on life’s precious moments. The song evokes a warm and emotional atmosphere of autumn, making it iconic among Korean listeners. In summary, "10월의 어느 멋진 날에 악보" means "sheet music for the song 'On a Lovely Day in October.'" This song's sheet music is widely shared and used for playing on various instruments, reflecting its popularity and cherished status in Korea.