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186

JavaScript: how to calculate the date that is 2 days ago?

rated 0 times [ 193] [ 7] / answers: 1 / hits: 141372 / 12 Years ago, wed, december 12, 2012, 12:00:00

Possible Duplicate:

Subtract days from a date in javascript

I have got a JavaScript that basically returns a date that is 2 days ago. It is as follows:

var x;

var m_names = new Array(January, February, March, 

    April, May, June, July, August, September, 

    October, November, December);



var d = new Date();

var twoDaysAgo = d.getDate()-2;  //change day here

var curr_month = d.getMonth();

var curr_year = d.getFullYear();

var x = twoDaysAgo + - + m_names[curr_month] + - + curr_year;



document.write(x);

Assuming today is 12-December-2012, the above will return the date 10-December-2012. I don't think this will work dynamically as we move forward into a new month, OR, change the day from -2 to -15. It will work only from the 3rd of the month.

How can I modify this so when it is 12-December-2012 today and I want it to return me the date 15 days ago it should be 27-November-2012... and not -3-December-2012?

Any help appreciated. Thanks!
I'm a Javascript newbie.

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leighamarleem

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2 Years ago

answered 12 Years ago alfonsok · Accepted Answer

If you have a date object, you can set it to two days previous by subtracting two from the date:

var d = new Date();

d.setDate(d.getDate() - 2);

console.log(d.toString());



// First of month

var c = new Date(2017,1,1); // 1 Feb -> 30 Jan

c.setDate(c.getDate() - 2);

console.log(c.toString());



// First of year

var b = new Date(2018,0,1); // 1 Jan -> 30 Dec

b.setDate(b.getDate() - 2);

console.log(b.toString());