All you need for the field code is:
{QUOTE
{SET Offset 9}
{SET mm{=MOD({MERGEFIELD Start_Date \@ MM}+MOD(Offset,12)+11,12)+1}}
{SET yy{=INT({MERGEFIELD Start_Date \@ yyyy}+({MERGEFIELD Start_Date \@ M}+Offset-1)/12)}}
{SET dd{=MAX(1,IF((mm=2),28+(MOD(yy,4)=0)+(MOD(yy,400)= 0)-(MOD(yy,100)=0),IF((mm=4)+(mm=6)+(mm=9)+(mm=11)>0, 30,31)))}}
"{dd}-{mm}-{yy}" \@ "d MMMM yyyy""}
where 'Start_Date' is the field name in your data source.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]

Thank you, I tried this code and it worked as intended.

Hi Macropod,
I've been using your beautiful formulae witrhin your tutorial. POroblem i currently face is that using your Calculate a day, date, month and year, using n weeks delay



i am unable to get the result to format into the format whic i require. I assume that this is beacuase the result is treated as text. Do you have a hack for that?