Help for rtc alarm project

hello there bro.I need a bit of your help for the project mentioned in the subject i have to interface a keypad of 4x4 with this circuit but i have no idea plz help me out asap i ve very less time left .thank u

its simple... just connect a keypad.. you have P0 vacant.. use it..
4 pins of P0 for sensing and rest of four pins for driving.. you should connect Pullups to P0 make sure.. coz its open collector.