You use SAS date and time informats to read date and time
expressions and convert them to SAS date and time values. Like
other SAS informats, date and time informats are composed of
informat names indicate the form of date expression that can be
read using that particular informat. Here are some examples of
common date and time informats:
As you know, there are several ways to represent a date. For example, all the following expressions represent the date October 15, 1999. Each of these common date expressions can be read using the appropriate SAS date informat. ...