Listen to Gulap Simi Day online. Gulap Simi Day is a Kokborok language song and is sung by Bimal Debbarma, Janardhan Debbarma and Subhadra Debbarma. Gulap Simi Day, from the album Sanma Nono, was released in the year 2012. The duration of the song is 3:39. Download Kokborok songs online from JioSaavn.