Watch the hindi classic song "O Ek Baar Aata Hai Din Aisa" from the Bollywood classic drama romantic superhit old Hindi movie Suraj (1966) starring Rajendra Kumar, Vyjayanthimala, Johnny Walker & Mumtaz. Directed by T. Prakash Rao & Produced by S. Krishnamurthy. Music by Shankar Jaikishan. This song is sung by Mohammed Rafi & Asha Bhosle..