>>?WEEK({^2008/12/29},3) && returns 52 >> >>but >>SET FWEEK TO 3 >>?WEEK({^2008/12/29}) && Returns 1 >>Read the help file about the secondf argument to the week function adn you will see that you can control what is concidered tthe first week of the year and therefore what week 12/29 fals in.