SAS reads date values
in one of the following forms:
yy or yyyy
is a two-digit or four-digit
integer that represents the year.
mm
is a two-digit integer
that represents the month.
The N in the informat name must be used and indicates
that you cannot separate the year and month values by blanks or by
special characters. SAS automatically adds a day value of 01 to the
value to make a valid SAS date variable.
Note: SAS
interprets a two-digit year as belonging to the 100-year span that
is defined by the YEARCUTOFF= system option.