The week / year data is week number, ie 1, 2, 3.... for say 2003?
Also, is the week stored as 01,02,03 or just 1/,2/,3/?
Try something like this:
=format (datevalue ("01/01/" & right([yourfield], 4) + (left ([yourfield], 2) * 7), "MM/01/YYYY")
This assumes a format like this: 01/2003.
ChaZ
Ascii dumb question, get a dumb Ansi