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.FUNCTION....: Month Date Arithmetic Functions .ALIAS.......: MODAARFUFunction name is "m" for "month arithmetic"..DISCUSSION..:
.EXAMPLES:
FDATE /Fm /N1 /A03-15-1992 /Imm-dd-ccyy /Omm-dd-ccyy
produces: 04-15-1992
FDATE /Fm /N-1 /A03-30-1991 /Imm-dd-ccyy /Omm-dd-ccyy
produces: 02-28-1991
FDATE /Fm /N-1 /A03-30-1992 /Imm-dd-ccyy /Omm-dd-ccyy
produces: 02-29-1992
.DISCUSSION..: Note that a too-simple algorithm for month arithmetic can produce
non-existent dates. Subtracting a month from March 30, 1991 (as
in the second example) could produce a result of February 30,
1991, a date which cannot exist.