Rekha has sung yesterday classic 'Din dhal jaye hai, raat na aye...' for her next film Amar Butala's 'Kudiyon Ka Hai Zamana'. It's a naughty story of 4 women living in a metro who share a warm camaraderie and discuss everything from their sex lives to their innermost fears. This film also stars Mahima Chaudhary, Kim Sharma and Vasundhara Das. Music is by Iqbal Darbar, brother of Ismail Darbar.