Introduction to Dates and Times in SAS

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1.1 How Does It Work? (January 1, 1960 and Midnight as Zero) ................................2
1.2 Internal Representation (Storage as Integers or Real Numbers)................................2
1.3 External Representation (Basic Format Concepts)...................................................3
1.4 Date and Time as Numeric Constants in SAS........................................................3
1.5 System Options Related to Dates .........................................................................5
1.6 Length and Numeric Requirements for Date, Time, and Datetime...........................12

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