9.1 Introduction9.2 How SAS Stores Dates9.3 Reading Date Values from Text Data9.4 Computing the Number of Years between Two Dates9.5 Demonstrating a Date Constant9.6 Computing the Current Date9.7 Extracting the Day of the Week, Day of the Month, Month, and Year from a SAS Date9.8 Creating a SAS Date from Month, Day, and Year Values9.9 Substituting the 15th of the Month when the Day Value Is Missing9.10 Using Date Interval Functions9.11 Problems