Question

118

JavaScript: get all months between two dates?

rated 0 times [ 120] [ 2] / answers: 1 / hits: 38356 / 9 Years ago, tue, may 26, 2015, 12:00:00

I have two date strings like this:

var startDate = '2012-04-01';

var endDate = '2014-11-01';

And I want to end up with an array of strings like this:

var dates = ['2012-04-01', '2012-05-01', '2012-06-01' .... '2014-11-01',];

So far this is what I've got, but it's pretty ugly:

var startDate = '2012-04-01';

var endDate = '2014-11-01';

var start = new Date(Date.parse(startDate));

var end = new Date(Date.parse(endDate))

var dates = [];

for (var i = start.getFullYear(); i < end.getFullYear() + 1; i++) {

    dates.push(i + '-' + '-01');

}

console.log(dates);

Is there a better way? JSFiddle.

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ishmaelw

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3 Years ago

answered 9 Years ago raveno · Accepted Answer

This should produce the desired output:

function dateRange(startDate, endDate) {

  var start      = startDate.split('-');

  var end        = endDate.split('-');

  var startYear  = parseInt(start[0]);

  var endYear    = parseInt(end[0]);

  var dates      = [];



  for(var i = startYear; i <= endYear; i++) {

    var endMonth = i != endYear ? 11 : parseInt(end[1]) - 1;

    var startMon = i === startYear ? parseInt(start[1])-1 : 0;

    for(var j = startMon; j <= endMonth; j = j > 12 ? j % 12 || 11 : j+1) {

      var month = j+1;

      var displayMonth = month < 10 ? '0'+month : month;

      dates.push([i, displayMonth, '01'].join('-'));

    }

  }

  return dates;

}

Just call it with your existing date format:

dateRange('2013-11-01', '2014-06-01')

// [2013-11-01, 2013-12-01, 2014-01-01, 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]