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Using JavaScript or jQuery, get the first and last date of the current month. [duplicate]


As the title suggests, I’m having trouble figuring out how to use JavaScript or jQuery to get the start and last dates of the current month and format them as:

For November, for example, it should be:

var firstdate = '11/01/2012';
var lastdate = '11/30/2012';

Asked by Moozy

Solution #1

It’s very simple, and there’s no need for a library:

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

or, if you 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 consider two-digit years to be in the twentieth century, resulting in:

new Date(14, 0, 1);

1 January 1914 is given. To avoid this, create a Date and then use setFullYear to set its values:

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

Answered by RobG

Solution #2

I used Datejs to fix it.

This is the first day’s warning:

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

The following is for the final day:

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

Answered by Moozy

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