DFrobot arduino UNO & RTC, Help whit code

good morning
my project is a system that controls an electric water heater to turn on only in times in which this programmed not spend energy at other times.
I want to make a menu for selection of time , selection and display alarm time and date.
Unfortunately I 'm not moving with the code .
I need you in the selection menu alarm keyboard can enter the hour and minutes of the alarm.
can you help me with the code ???
Thank you very much.

I leave the code with which I am working to give me advice …

prueba2.ino (6.69 KB)