Listen to Halcyon Days (Cosmaks Remix) online. Halcyon Days (Cosmaks Remix) is an Instrumental language song and is sung by Retland. Halcyon Days (Cosmaks Remix), from the album Halcyon Days (Calmtone Remix), was released in the year 2024. The duration of the song is 3:28. Download Instrumental songs online from JioSaavn.