Comparing Durations and SAS Date Values

You can use SAS date values to find the units of time between dates. Tradewinds Travel was founded on February 8, 1982. On November 23, 1999, you decide to find out how old Tradewinds Travel is, and you write the following program: 
options yearcutoff=1920;
   /* Calculating a duration in days */
data ttage;
   Start = '08feb82'd;
   RightNow = today();
   Age = RightNow - Start;
   format Start RightNow date9.;
run;

proc print data=ttage;
   title 'Age of Tradewinds Travel';
run;
The following output displays the results:
Display 15.12 Calculating a Duration in Days
Calculating a Duration in Days
The value of Age is 11404, a number that looks like an ...

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