This Sunday last Sunday

gistfile1.js

var created = new GlideDateTime(); //now
var dtUtil = new DateTimeUtils(); //Helper class
var firstDay = gs.getProperty("com.snc.time_card.start_day", 7); //default to Sunday
var cardStart = dtUtil.getWeekStart(created, firstDay).getDisplayValue(); //GlideDate
gs.log("CARDSTART This week: " + cardStart);
gs.log("CARDSTART Last week: " + getLastWeek(cardStart));


function getLastWeek(currentWeek){
	gs.log("I'v been called with: " + currentWeek);
        var sevenDaysMilliSeconds = 604800000;
        var objLastWeek = new GlideDateTime(currentWeek + ' 00:00:00');
        objLastWeek.subtract(sevenDaysMilliSeconds);
        return objLastWeek.getValue().split(" ")[0];


    }