node.js get dates of last 12 months

This function gets the dates of last 12 months.

var last12Month = function() {
	var dates = [];
		d = new Date(),
		y = d.getFullYear(),
		m = d.getMonth();
	function padMonth(month){
		if(month<10){
			return '0'+month;
		} else {
			return month;
		}
	}
	if( m === 11 ) {
		for(var i=1; i<13; i++) {

			dates.push(y+"-"+ padMonth(i) +"-01");
		}
	} else {
		for(var i=m+1; i<m+13; i++) {
			if( (i%12) > m ) {
				dates.push( (y-1) + "-" +  padMonth(i+1) + "-01" );
			} else {
				dates.push( y + "-" + padMonth((i%12)+1) + "-01" );
			}
		}
	}

	return dates;
}
console.log(last12Month());

If the current month is Jan 2015, the output will be:

[ '2014-02-01',
  '2014-03-01',
  '2014-04-01',
  '2014-05-01',
  '2014-06-01',
  '2014-07-01',
  '2014-08-01',
  '2014-09-01',
  '2014-10-01',
  '2014-11-01',
  '2014-12-01',
  '2015-01-01' ]