A tiny utility for creating a json array of dates 1 week apart

weekly_date.js

/*

  A tiny utility for creating a json array of dates.  
  I need this for creating year-long timetables where after an initial start
  we have a few weeks off for christmas, then easter, and these weeks differ
  each year, so the 'switches' make it easy to include weeks (signified by a 1)
  or exclude weeks (a 0)

Note that monts start at 0 not 1 :-)

*/

var d, switches, num, weeks, week;

weeks = [];
d = new Date(2012, 8, 24);
switches = [1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,1,1,1,1,1,1,0,0,0,1,1,1,1,1,1,0,0,0,0,0,1,1];
num = switches.reduce(function(p, c){  
  return p + c;  
});

for (week = 0; week < 99; week++) {

  // if the week is a "1" in the array of 
  if (switches[week] == 1) {
    weeks.push(
      d.toString()
    );
  }
  
  // add seven days
  d.setDate(d.getDate()+7);  
  
  
}


console.log(weeks);