Get first and last date of current month with JavaScript or jQuery [duplicate]

Get first and last date of current month with JavaScript or jQuery [duplicate]

Possible Duplicate:
Calculate last day of month in JavaScript
What is the best way to determine the number of days in a month with JavaScript?

As title says, I’m stuck on finding a way to get the first and last date of the current month with JavaScript or jQuery, and format it as:
For example, for November it should be :
var firstdate = ’11/01/2012′;
var lastdate = ’11/30/2012′;


Solution 1:

Very simple, no library required:

var date = new Date();
var firstDay = new Date(date.getFullYear(), date.getMonth(), 1);
var lastDay = new Date(date.getFullYear(), date.getMonth() + 1, 0);

or you might prefer:

var date = new Date(), y = date.getFullYear(), m = date.getMonth();
var firstDay = new Date(y, m, 1);
var lastDay = new Date(y, m + 1, 0);


Some browsers will treat two digit years as being in the 20th century, so that:

new Date(14, 0, 1);

gives 1 January, 1914. To avoid that, create a Date then set its values using setFullYear:

var date = new Date();
date.setFullYear(14, 0, 1); // 1 January, 14

Solution 2:

I fixed it with Datejs

This is alerting the first day:

var fd =;
var firstday = fd.toString("MM/dd/yyyy");

This is for the last day:

var ld =;
var lastday = ld.toString("MM/dd/yyyy");

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