A SAS date value is
a number that represents the number of days from January 1, 1960 to
a specific date. The JULDATE function converts a SAS date value to
a Julian date. If
date falls
within the 100-year span defined by the system option YEARCUTOFF=,
the result has three, four or five digits: In a five-digit result,
the first two digits represent the year, and the next three digits
represent the day of the year (1 to 365, or 1 to 366 for leap years).
As leading zeros are dropped from the result, the year portion of
a Julian date can be omitted (for years ending in 00) or it can have
only one digit (for years ending 01–09). Otherwise, the result
has seven digits: the first four digits represent the year, and the
next three digits represent the day of the year.
For years that end between
00–09, you can format the five-digit Julian date by using the
Z5. format.