9. Pepero Day in Korea is on November 11th. The first Pepero Day was officially celebrated in 1997 in Korea. There are many explanations about why this date was chosen, including the idea that the tall, thin Pepero resembles the number 1 and November 11th (11/11) is like four Pepero lined up together. Another story is that Korean schoolgirls ate Pepero to become tall and thin, like the shape of a Pepero.