.EXAMPLES:
find date of Thanksgiving (4th Thursday in November) in 1992
Fdate /Fw /A11-01-1992 /Imm-dd-ccyy /D5 /N4 /Od1
returns: Thursday November 26, 1992
find the beginning of the work-week (Monday, 2nd day of week)
AFTER Thanksgiving, 1992
Fdate /Fw /A11-26-1992 /Imm-dd-ccyy /D2 /N1 /Od1
find the beginning of the work-week (Monday, 2nd day of week)
BEFORE Thanksgiving, 1992
Fdate /Fw /A11-26-1992 /Imm-dd-ccyy /D2 /N-1 /Od1
find last Friday's date (even if today is Friday)
Fdate /Fw /At /D6 /N-1 /X /P"Last Friday was: "