This javascript snippet gets the date of the next day requested

GetNextUpcomingDate.js

  function getNextDate(whichDay) {
    console.log(whichDay);
    var today = new Date();  //Wed Oct 28 2015
    var currentDayOfWeek = today.getDay(); //0-6
    var thisWeeksSunday = today.getDate() - currentDayOfWeek; //1-31
    var theDate = today;
    
    //if whichDay has not happened this week yet:
    if (whichDay > currentDayOfWeek) { //then get this weeks whichday
      theDate.setDate(thisWeeksSunday + whichDay);
      return theDate;
    } else { //if we are here, then which day has passed this week, so get next weeks whichDay
      theDate.setDate(thisWeeksSunday + 7 + whichDay);
      return theDate;
    }
  }
  console.log(getNextDate(0)); //Sun Nov 01 2015 
  console.log(getNextDate(1)); //Mon Nov 02 2015 
  console.log(getNextDate(2)); //Tue Nov 03 2015
  console.log(getNextDate(3)); //Wed Nov 04 2015 
  console.log(getNextDate(4)); //Thu Oct 29 2015 
  console.log(getNextDate(5)); //Fri Oct 30 2015 
  console.log(getNextDate(6)); //Sat Oct 31 2015