Hello,I'm sure this is something simple I am missing :-) Here is the js I am using. var dateToNumber = Date2Num(form1.page2.page2Date.rawValue, "MM/DD/YYYY"); var datePlusDays = dateToNumber + firstRowWeek.rawValue * 7; var boosterDate = Num2Date(datePlusDays, "MM/DD/YYYY"); form1.page2.invoiceTa...