A calendar date can be represented in the SAS system as a SAS date value, a special representation of a calendar date provided by SAS software. SAS date values are easy to use once a few basic concepts are understood. This paper shows how to create, transform, and print SAS date values. It reviews tools used with SAS date values, such as formats, informats, and DATA step functions, and the effect of the SAS system option YEARCUTOFF. The paper focuses on SAS date values, but also reviews other ways to represent calendar dates, and some problems that can occur when SAS date values are not used.
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