How are the weekday values represented in the WEEKDAY function in SAS?

The WEEKDAY function in SAS is designed to return the day of the week as a numeric value based on a specific coding scheme. In this scheme, the days of the week start with Sunday as 1 and go through to Saturday as 7. This means that when you use the WEEKDAY function, a return value of 1 corresponds to Sunday, 2 to Monday, and so on, up to 7 which corresponds to Saturday. This standard representation facilitates the process of analyzing data by days of the week in various applications of SAS. Understanding this coding is essential for correctly interpreting and manipulating date-related data within SAS programs.