Hi,Refer these two links

[Prabakaran P M]

Hi,

Refer these two links these are based on the c code. you can get logic ideas to code yourself.

http://www.engineersgarage.com/microcontroller/8051projects/LCD-based-digital-clock-AT89C51-circuit

http://www.engineersgarage.com/microcontroller/8051projects/lcd-clock-rtc-12c887-AT89C51-update-interrupt-circuit