International colorectal conference titled `Colocon 2015`, organised by the Colorectal Disease Patients` Welfare Association, an NGO under care of surgical unit 3, the Civil Hospital Karachi, at the Pearl Continental hotel at 8:30arn.`Silent auction`, Aaghaz-iSafar, for which 100 artists have contributed their original artworks, to raise funds for renovation of the Cantonment Railway Station building, organised by the Pursukoon Karachi, an initiative of the Koel gallery, at Frere Hall at 5:00pm. The exhibition will remain open till May 24, daily from 11am to 8:00pm.