See I have a calendar, I only need to fill it with numbers, but that would still display the number from the previous month and not the blank cells. Can tell the algorithm how to do, and that is something I can't do it?
The calendar itself
var last = new Date(firstDateAtMonth.getTime() - (allDaysInMonth * 24 * 60 * 60 * 1000));
var lastDay = last.getDate();
calendarHTML += lastDay;
Code to fill in at line number 52