CODEWITHSUNDEEP
javascriptdate
ajithmanmu
ajithmanmu

Reputation: 1169

Finding date by subtracting X number of days from a particular date in Javascript

I want to find date by subtracting X number of days from a particular date in JavaScript. My JavaScript function accepts 2 parameters. One is the date value and the other is the number of days that needs to be subtracted.

For example, I pass my argument date as 27 July 2009 and i pass my other argument as 3. So i want to calculate the date 3 days before 27 July 2009. So the resultant date that we should get is 24 July 2009. How is this possible in JavaScript. Thanks for any help.

Upvotes: 47

Views: 51837

Answers (9)

Malvi Panchal
Malvi Panchal

Reputation: 33

I have created a function for date manipulation. you can add or subtract any number of days, hours, minutes. 

function dateManipulation(date, days, hrs, mins, operator) {
    date = new Date(date);
    if (operator == "-") {
       var durationInMs = (((24 * days) * 60) + (hrs * 60) + mins) * 60000;
       var newDate = new Date(date.getTime() - durationInMs);
    } else {
       var durationInMs = (((24 * days) * 60) + (hrs * 60) + mins) * 60000;
       var newDate = new Date(date.getTime() + durationInMs);
    }
   return newDate;
}

Now, call this function by passing parameters. For example, here is a function call for getting date before 3 days from today.

var today = new Date();
var newDate = dateManipulation(today, 3, 0, 0, "-");

Upvotes: 0

Ankit Uniyal
Ankit Uniyal

Reputation: 61

this is in reference to above answer check this fiddle

https://jsfiddle.net/uniyalguru/azh65aa0/

function Cureent_Date() {
var today_GMT = new Date();
var dd = today_GMT.getDate();
var mm = today_GMT.getMonth() + 1; //January is 0!
var yyyy = today_GMT.getFullYear();
if (dd < 10) {
    dd = '0' + dd
}
if (mm < 10) {
    mm = '0' + mm
}
current_date = mm + '/' + dd + '/' + yyyy;

Upvotes: 0

Keshav Mukati
Keshav Mukati

Reputation: 99

Never go for this solution yourDate.setDate(yourDate.getDate() - daysToSubtract);

it wont work in case your date is 1st of any month and you want to delete some days say 1.

Instead go for below solution which will work always

var newDate = new Date( yourDate.getTime() - (days * 24 * 60 * 60 * 1000) );

Upvotes: 9

Chintan Khetiya
Chintan Khetiya

Reputation: 16152

Here i am posting one more answer and that will return date in specific format.

First you can get current date 10/08/2013 as below

function Cureent_Date() {
    var today_GMT = new Date();
    var dd = today_GMT.getDate();
    var mm = today_GMT.getMonth() + 1; //January is 0!
    var yyyy = today_GMT.getFullYear();
    if (dd < 10) {
        dd = '0' + dd
    }
    if (mm < 10) {
        mm = '0' + mm
    }
    current_date = mm + '/' + dd + '/' + yyyy;
    alert("current_date"+current_date);

    Back_date();
}

Now Get back date base on X days

function Back_date()
{    
    var back_GTM = new Date(); back_GTM.setDate(back_GTM.getDate() - 2); // 2 is your X
    var b_dd = back_GTM.getDate();
    var b_mm = back_GTM.getMonth()+1;
    var b_yyyy = back_GTM.getFullYear();
    if (b_dd < 10) {
        b_dd = '0' + b_dd
    }
    if (b_mm < 10) {
        b_mm = '0' +b_mm
    }

    var back_date=  b_mm + '/' + b_dd + '/' + b_yyyy;
    alert("back_date"+back_date);
}

So, Today is 10/08/2013 so it will return 10/06/2013.

Check Live Demo here Hope this answer will help you.

Upvotes: 2

neoneye
neoneye

Reputation: 52221

function date_by_subtracting_days(date, days) {
    return new Date(
        date.getFullYear(), 
        date.getMonth(), 
        date.getDate() - days,
        date.getHours(),
        date.getMinutes(),
        date.getSeconds(),
        date.getMilliseconds()
    );
}

Upvotes: 23

Jim Davis
Jim Davis

Reputation: 1230

Just another option, which I wrote:

DP_DateExtensions Library

It's probably overkill if ALL you want to do is one calculation, but if you're going to do more date manipulation you might find it useful.

Supports date/time formatting, date math (add/subtract date parts), date compare, date parsing, etc.

Upvotes: 0

tvanfosson
tvanfosson

Reputation: 532615

This is what I would do. Note you can simplify the expression, I've just written it out to make it clear you are multiplying the number of days by the number of milliseconds in a day.

 var newDate = new Date( yourDate.getTime() - (days * 24 * 60 * 60 * 1000) );

Upvotes: 0

OneOfOne
OneOfOne

Reputation: 99351

Here's an example, however this does no kind of checking (for example if you use it on 2009/7/1 it'll use a negative day or throw an error.

function subDate(o, days) {
// keep in mind, months in javascript are 0-11
return new Date(o.getFullYear(), o.getMonth(), o.getDate() - days);;
}

Upvotes: 1

Daniel F. Thornton
Daniel F. Thornton

Reputation: 3685

Simply:

yourDate.setDate(yourDate.getDate() - daysToSubtract);

Upvotes: 81

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