Maybe not the prettiest thing, but if you put 1/1/08 in B1 and 40 in A1,

=IF(WEEKDAY(B1+A1*7,1)=2,WEEKDAY(B1+A1*7,1),WEEKDA Y(B1+A1*7,1)-WEEKDAY(B1+A1*7,1)+2)

should get you there.

"Alonso" wrote:

I know that using the function WEEKNUM you can get the number for a week
through a year

eg. =WEEKNUM(09/29/2008) gets 40

my question is
can it be done backwards??

what i want to do is
type the number of the week (A1)
and get the date of the monday of that week (on B1)

ie
if i type 41
i should get 10/06/2008
(the date of the monday of week 41)