This program was written to keep track of when a person can give a pint of blood again
after giving one pint of blood, nothing more. The algorithm simply adds 56 days to the
day the pint of blood was given and adjusts the year, month, and day to reflect the correct
Month/Day/Year for the next date you will be allowed to give another pint of blood again.
If you notice a problem please email me with the original Date, MM/DD/YYYY and the calculated date, MM/DD/YYYY so I can duplicate the problem and correct the algorithm.