Subtract days from a date in JavaScript

Answer 1

split your date into parts, then return a new Date with the adjusted values

function DateAdd(date, type, amount){
    var y = date.getFullYear(),
        m = date.getMonth(),
        d = date.getDate();
    if(type === 'y'){
        y += amount;
    };
    if(type === 'm'){
        m += amount;
    };
    if(type === 'd'){
        d += amount;
    };
    return new Date(y, m, d);
}

Remember that the months are zero based, but the days are not. ie new Date(2009, 1, 1) == 01 February 2009, new Date(2009, 1, 0) == 31 January 2009;

Answer 2

Use MomentJS.

function getXDaysBeforeDate(referenceDate, x) {
  return moment(referenceDate).subtract(x , 'day').format('MMMM Do YYYY, h:mm:ss a');
}

var yourDate = new Date(); // let's say today
var valueOfX = 7; // let's say 7 days before

console.log(getXDaysBeforeDate(yourDate, valueOfX));

<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.22.2/moment.min.js"></script>

Answer 3

If you want to both subtract a number of days and format your date in a human readable format, you should consider creating a custom DateHelper object that looks something like this :

var DateHelper = {
    addDays : function(aDate, numberOfDays) {
        aDate.setDate(aDate.getDate() + numberOfDays); // Add numberOfDays
        return aDate;                                  // Return the date
    },
    format : function format(date) {
        return [
           ("0" + date.getDate()).slice(-2),           // Get day and pad it with zeroes
           ("0" + (date.getMonth()+1)).slice(-2),      // Get month and pad it with zeroes
           date.getFullYear()                          // Get full year
        ].join('/');                                   // Glue the pieces together
    }
}

// With this helper, you can now just use one line of readable code to :
// ---------------------------------------------------------------------
// 1. Get the current date
// 2. Subtract 5 days
// 3. Format it
// 4. Output it
// ---------------------------------------------------------------------
document.body.innerHTML = DateHelper.format(DateHelper.addDays(new Date(), -5));

(see also this Fiddle)

Answer 4

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, "-");

Answer 5

var dateOffset = (24*60*60*1000) * 5; //5 days
var myDate = new Date();
myDate.setTime(myDate.getTime() - dateOffset);

If you're performing lots of headachy date manipulation throughout your web application, DateJS will make your life much easier:

http://simonwillison.net/2007/Dec/3/datejs/

Answer 6

This will give you last 10 days result 110% working you will not get any type of issue

var date = new Date();
var day=date.getDate();
var month=date.getMonth() + 1;
var year=date.getFullYear();
var startDate=day+"/"+month+"/"+year;
var dayBeforeNineDays=moment().subtract(10, 'days').format('DD/MM/YYYY');
startDate=dayBeforeNineDays;
var endDate=day+"/"+month+"/"+year;

you can change the subtract days according to your requirements