See the relevant section of http://www.gmayor.com/formatting_word_fields.htm

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Graham Mayor - Word MVP
My web site www.gmayor.com
Word MVP web site http://word.mvps.org
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> I have a mergefield call Appt_Date What is the syntax to have Word
> print the Appt_Date if iit is was greater then 6 months ago, otherwise
> to print "You are Up to Date"