Develop Reference

Convert Current date in IST format using Javascript

I want to convert current date value to the below format using javascript
2019-08-23T08:23:47+0530
I had tried the following code
var currentTime = new Date();
var currentOffset = currentTime.getTimezoneOffset();
var ISTOffset = 330; // IST offset UTC +5:30
var ISTTime = new Date(currentTime.getTime() + (ISTOffset + currentOffset)*60000);
and also try to convert to toUTCString(). But any of them gives the desired format.

try this it will work for ISO date
Date.prototype.toIsoString = function() {
var timezone = -this.getTimezoneOffset(),
DF = timezone >= 0 ? '+' : '-',
pad = function(nm) {
var narmal = Math.floor(Math.abs(nm));
return (narmal < 10 ? '0' : '') + narmal;
};
return this.getFullYear() +
'-' + pad(this.getMonth() + 1) +
'-' + pad(this.getDate()) +
'T' + pad(this.getHours()) +
':' + pad(this.getMinutes()) +
':' + pad(this.getSeconds()) +
DF + pad(timezone / 60) +
'' + pad(timezone % 60);
}
var date = new Date();
alert(date.toIsoString())

Add day(s) in a date in Javascript

I have textbox displaying date and have a button. the function in button is to add 7 days and display in textbox. my code:
function onNext() {
var startdate = document.getElementById('date').value;
var addday = new Date(startdate);
var dd = addday.getDate() + 7;
var mm = addday.getMonth() + 1;
var y = addday.getFullYear();
var displaydate = y + '/' + mm + '/' + dd;
document.getElementById('date').value = displaydate ;
}
The issue how to add a day to go to the next month.
Example the date in Textbox is 2014/08/25 when I click the button the date will be 2014/09/01

Just add 7 days to your date, date already handles change of month/year:
function onNext() {
var startdate = document.getElementById('date').value;
var addday = new Date(startdate);
addday.setDate(addday.getDate() + 7);
var dd = addday.getDate() + 7;
var mm = addday.getMonth() + 1;
var y = addday.getFullYear();
var displaydate = y + '/' + mm + '/' + dd;
document.getElementById('date').value = displaydate ;
}

If you just do this
var dd = addday.getDate() + 7;
var mm = addday.getMonth() + 1;
var y = addday.getFullYear();
that means if date is 21.12.2014 the output will be 28.13.2014
function onNext() {
var startdate = document.getElementById('date').value;
var d2 = new Date(startdate);
d2.setMonth(d2.getMonth()+1);
d2.setDate(1); // you can set here whatever date you want
document.getElementById('date').value = d2.getFullYear() + '/' + d2.getMonth() + '/' + d2. getDate();
}

Use this function
function updateAb(s){//format dd/mm/yyyy chnage according to your need
var dmy = s.split("/");
var joindate = new Date(
parseInt(dmy[2], 10),
parseInt(dmy[1], 10) - 1,
parseInt(dmy[0], 10)
);
var data_days=7;
joindate.setDate(joindate.getDate() + data_days);
var cc=("0" + joindate.getDate()).slice(-2) + "/" +("0" + (joindate.getMonth() + 1)).slice(-2) + "/" +joindate.getFullYear();
document.getElementById("datepickerdisabled1").value=cc;
}

Show current date

I am using the following to get the current date:-
var dateObj = new Date();
var month = dateObj.getUTCMonth() + 1;
var day = dateObj.getUTCDate();
var year = dateObj.getUTCFullYear();
var newdate = day + "/" + month + "/" + year;
If I alert(newdate); it shows:-
3/06/2013
Is there any way I can display this as:-
03/06/2013

With plain Javascript, only manually
if (day < 10) day = "0" + day;
if (month < 10) month = "0" + month;

If you want to avoid using a library, and don't mind an extra line in your JavaScript:
var day = dateObj.getUTCDate(),
dd = parseInt(day, 10) < 10 ? '0' + day : day;

Using JQuery DateFormat:
$.format.date(dateObj.toString(), "dd/MM/yyyy");

var mydate=new Date();
alert(mydate.toString('dd/MM/yyyy'));

function padWithZeroes(number, width)
{
while (number.length < width)
number = '0' + number;
return number;
}
Now call day = padWithZeroes(day, 2) (and likewise for the month) before you use it.

You can split it and create your own format:
var splitTime = newDate.split("/");
var day = splitTime[0];
var month = splitTime[1];
var year = splitTime[2];
if (day < 10){
day = "0" + day;
}
var myDate = day + '/' + month + '/' + year;
Living demo:
http://jsfiddle.net/rtqpp/

Please use the following:
var dateObj = new Date();
var month = ('0' + (dateObj.getUTCMonth() + 1) ).slice( -2 );;
var day = ('0' + (dateObj.getUTCDate() + 1) ).slice( -2 );
var year = dateObj.getUTCFullYear();
var newdate = day + "/" + month + "/" + year;

using date in javascript

I have trouble using date in Javascript, in PHP you use something like date("Y-m-d H:i s") to retrieve the specific date and time, how can I achieve this in Javascript? the getMonth() method only returns 1 digit, I really need them to be in 2 digits

Since I made comments on almost all answers, I'd better post my suggestion
DEMO
function pad(num) { return ("0"+num).slice(-2); }
function getDisplayDate() {
var date = new Date();
return date.getFullYear()+
"-"+pad(date.getMonth()+1)+
"-"+pad(date.getDate())+
" "+pad(date.getHours())+
":"+pad(date.getMinutes())+
":"+pad(date.getSeconds());
}
setInterval(function() {
document.getElementById("time").innerHTML=getDisplayDate();
},500);

why dont you add 0 before when you get <10

Try this :
function dateToYMD(date) {
var d = date.getDate();
var m = date.getMonth() + 1;
var y = date.getFullYear();
return '' + y + '-' + (m<=9 ? '0' + m : m) + '-' + (d <= 9 ? '0' + d : d) + ' ' + date.getHours() + ':' + date.getMinutes() + ':' + date.getSeconds();
}
var d = new Date();
alert(dateToYMD(d));

This code is adjusted based on the pointers given by #mplungjan -- (credits to him please)
Also check out his solution, which is a better one for use with date digits.
var str = 10; // month-digit from getMonth()
function pad(val) {
return "0" + val;
}
var month = str < 10 ? pad(str) : str;
console.log(month);

you can year, minutes, etc from Date class. You can get 2 digits month using some trick like example below. e.g
Date.prototype.getLongMonth = function() {
var month = this.getMonth();
if (String(month).length == 1) month = '0'.concat(month);
return month;
}
var now = new Date();
var theDate = now.getFullYear() + '-' + now.getLongMonth() + '-' + now.getDate() + ' ' + now.getHours() + ':' + now.getMinutes() + ':' + now.getSeconds();
console.log(theDate); // result : 2013-02-17 12:41:2

How to get correct gmt time in Javascript

For using the Amazon mechanical turk API I want to get the current GMT time and show it in ISO format
2011-02-24T20:38:34Z
I am wondering if there is any way to correctly get the gmt time and also be able to reformat it with ISO format. I can use something like now.toGMTString(); but it makes a string out of the date and it is hard to reformat it with ISO.

var year = now.getUTCFullYear()
var month = now.getUTCMonth()
var day= now.getUTCDay()
var hour= now.getUTCHours()
var mins= now.getUTCMinutes()
var secs= now.getUTCSeconds()
var dateString = year + "-" + month + "-" + day + "T" + hour + ":" + mins + ":" + secs + "Z"
You should be using UTC now instead of GMT. (Amounts to almost the same thing now, and it is the new standard anyway)

I believe this will work for you:
Number.prototype.pad = function(width,chr){
chr = chr || '0';
var result = this;
for (var a = 0; a < width; a++)
result = chr + result;
return result.slice(-width);
}
Date.prototype.toISOString = function(){
return this.getUTCFullYear().pad(4) + '-'
+ this.getUTCMonth().pad(2) + '-'
+ this.getUTCDay().pad(2) + 'T'
+ this.getUTCHours().pad(2) + ':'
+ this.getUTCMinutes().pad(2) + ':'
+ this.getUTCSeconds().pad(2) + 'Z';
}
Usage:
var d = new Date;
alert('ISO Format: '+d.toISOString());
Not much more different than every else's answer, but make it built-in to the date object for convenience

function pad(num) {
return ("0" + num).slice(-2);
}
function formatDate(d) {
return [d.getUTCFullYear(),
pad(d.getUTCMonth() + 1),
pad(d.getUTCDate())].join("-") + "T" +
[pad(d.getUTCHours()),
pad(d.getUTCMinutes()),
pad(d.getUTCSeconds())].join(":") + "Z";
}
formatDate(new Date());
Output:
"2011-02-24T21:01:55Z"

This script can take care of it
/* use a function for the exact format desired... */
function ISODateString(d){
function pad(n){return n<10 ? '0'+n : n}
return d.getUTCFullYear()+'-'
+ pad(d.getUTCMonth()+1)+'-'
+ pad(d.getUTCDate())+'T'
+ pad(d.getUTCHours())+':'
+ pad(d.getUTCMinutes())+':'
+ pad(d.getUTCSeconds())+'Z'}
var d = new Date();
document.write(ISODateString(d)); // prints something like 2009-09-28T19:03:12Z