The PDJULIw.
format writes SAS date values in the form ccyydddF:
cc
is the one-byte representation
of a two-digit integer that represents the century.
yy
is the one-byte representation
of a two-digit integer that represents the year. The PDJULIw.
format makes an adjustment for the century byte by subtracting 1900
from the four-digit Gregorian year to produce the correct packed decimal ccyy representation.
A year value of 1998 is stored in ccyy as
0098, and a year value of 2011 is stored as 0111.
ddd
is the one-and-a-half
byte representation of the three-digit integer that corresponds to
the Julian day of the year, 1–365 (or 1–366 for leap
years).
F
is the half byte that
contains all binary 1s, which assigns the value as positive.
Note: SAS
interprets a two-digit year as belonging to the 100-year span that
is defined by the YEARCUTOFF= system option.