pls...I need help.... on timer circuits

can somebody give me any idea on how to make a timer circuit for my project that would:
-count down when a button is pressed the current value increments to a certain value (1 - 15hrs)depending on the settings.
-the timer would tell how many times the button is pressed.
-would also calculate how many weeks since it has last pressed.
-when the timer reaches 0 the buzzer beeps..

im sorry....

what i mean is..
-a countdown timer. in the circuit there is a button when it is pressed it adds a value (that is from 1-15 hrs, depending on the settings) from the current remaining time.

-also it would tell on how many times the button is pressed (the button that adds a value)