Listen to Saghan Gahan Raatri online. Saghan Gahan Raatri is a Bengali language song and is sung by Swagatalakshmi Dasgupta. Saghan Gahan Raatri, from the album Sanchayan Swagatalakshmi Dasgupta Vol - 2, was released in the year 2000. The duration of the song is 6:12. Download Bengali songs online from JioSaavn.