How to add a day (or 2 days) to date 31.07.2012 and return result in format dd.MM.yyyy (same format as input date)?
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5 Answers
The best way would be to use the javascript date object. The date object in javascirpt is initialized as mm/dd/yyyy or as Date(year,month-1, date). That is,
dateString = "31.07.2012"
dateSplit = dateString.split('.')
date = new Date(dateSplit[2], dateSplit[1]-1, dateSplit[0])
date.setDate(date.getDate()+2)
newDateString = ((date.getDate() > 10) ? date.getDate() : ("0" + date.getDate())) + "." + ((date.getMonth()+1 > 10) ? date.getMonth()+1 : ("0" + (date.getMonth()+1))) + "." + (date.getFullYear())
month-1 is used in Date(year,month-1, date) because months start with 0
The result will be
"02.08.2012"
3 Comments
RobG
The date object in javascirpt is initialized as mm/dd/yyyy, no, it isn't. Only one string format is specified in ES5 and that isn't it. Otherwise, it's implementation dependent.
Jacob George
@RobG try date = new Date("07/31/2012"). It will create a date object as "Tue Jul 31 2012 14:26:59 GMT+0530 (India Standard Time)". I didnt say that it is the only way to initialize a date object.
RobG
—parsing of strings other than the format specified in ES5 is implementation dependent. Further, the ES5 format isn't supported by all browsers in use, therefore is should not be relied upon. The format month/day/year is peculiar to a very small proportion of the world's population and is not supported by any official standard.
var numDaysToAdd = 2;
var inputDateString = "31.07.2012";
var resultDate = stringToDate(inputDateString);
resultDate.setDate( resultDate.getDate()+numDaysToAdd );
var result = dateToString( resultDate );
alert(result);
function stringToDate( aString )
{
var dateArray = aString.split(".");
return new Date(dateArray[2],dateArray[1]-1,dateArray[0]);
}
function dateToString( aDate )
{
var date = aDate.getDate();
date = (date > 9) ? date : "0"+date.toString();
var month = aDate.getMonth()+1;
month = (month > 9) ? month : "0"+month.toString();
var year = aDate.getFullYear();
return (date+"."+month+"."+year);
}
2 Comments
Mikhail Payson
Also you can add these functions to Date.prototype. It would be more object oriented
Mikhail Payson
oops, indeed. I hope it is not a big deal to switch the parameters :). Just fixed.
/**
* Format date (2012.08.31)
*/
Date.prototype.format = function() {
var yyyy = this.getFullYear().toString();
var mm = (this.getMonth()+1).toString(); // getMonth() is zero-based
var dd = this.getDate().toString();
return yyyy + '.' + (mm[1]?mm:"0"+mm[0]) + '.' + (dd[1]?dd:"0"+dd[0]); // padding
}
/**
* Increase current time
*/
Date.prototype.increase_days = function(days) {
this.setTime(this.getTime() + (days * (1000 * 60 * 60 * 24)));
return this;
}
//usage:
var date = new Date();
date.increase_days(2);
console.log(date.format());
Comments
assuming inputDateString format is dd.mm.yyyy
function addDaysToDate (inputDateString ,noOfDays ){
var myDate=dateString.split(".");
var newDate=myDate[1]+"/"+myDate[0]+"/"+myDate[2];
var dateInMilliSec = new Date(newDate).getTime();
var addDaysToTime = new Date(dateInMilliSec + (86400000 * noOfDays));
var dd = addDaysToTime.getDate();
var MM = addDaysToTime.getMonth()+1;
var yyyy = addDaysToTime.getFullYear();
return dd+"."+MM+"."+yyyy;
};
Comments
This will do it for you
var d = "31.07.2012";
d = d.split(".");
date = new Date(d[2],d[1]-1,d[0]);
date.setDate(date.getDate() + 2);
document.body.innerHTML += (date.getDate() + "." + date.getMonth() + "." + (date.getFullYear()));
1 Comment
RobG
You forgot to subtract one from the month number.