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convert month-day-year into day-month-year using javascript

I'm trying to convert a MM/DD/YYYY date to a long date. So for example, 02/16/2020 would convert to something like 16/02/2020.
Is there a way to make this date conversion accurately?

You need to specify the original format of the time, and then convert it to a new format.
const date = "02/16/2020";
alert(moment(date, "MM/DD/YYYY").format('DD/MM/YYYY'));
<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.24.0/moment.min.js"></script>

Use moment for date formatting:
Sample Code:
moment('02/16/2020').format('16/02/2020');
You can play with date by moment.js. It is very useful tool for javascript developer.
Momemet Js Document
For dynamic value:
moment(yourDate, 'MM/DD/YYYY').format('DD/MM/YYYY');
Here, yourDate is your dynamic value date.

check this. its work.
function formatDate(date) {
var d = new Date(date),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = d.getFullYear();
if (month.length < 2) month = '0' + month;
if (day.length < 2) day = '0' + day;
return [day,month,year].join('/');
}
document.getElementById('res').innerHTML = formatDate('02/16/2020') ;
<div id="res">res</div>

2 || 1 liners ?
var src = '02/16/2020'
var a = src.split('/');
console.log(a.concat(a.splice(0, 2)).join('/'));
console.log(src.replace(/(\d+)\/(\d+)\/(\d+)/, '$3/$1/$2'));

If you want a conversion just between the exact formats you have mentioned:
function dfConvert(f) {
var farr = f.split("/");
return `${farr[1]}/${farr[0]}/${farr[2]}`;
}
var input = "02/16/2020";
console.log(`input: ${input}`)
console.log(`output: ${dfConvert(input)}`);
If you want the actual date object and from that you want your mentioned format for some reason:
function toDate(f) {
var farr = f.split("/");
return new Date(parseInt(farr[2]), parseInt(farr[0])-1, parseInt(farr[1]))
}
function dfConvert(f) {
var d = toDate(f)
var day = d.getDate()
var month = (d.getMonth() + 1)
var year = d.getFullYear()
return `${((day.toString().length <= 1) ? "0": "")}${day}/${((month.toString().length <= 1) ? "0": "")}${month}/${year}`
}
var input = "02/16/2020"
console.log(`input: ${input}`)
console.log(`output: ${dfConvert(input)}`)
Hope it helps

web api not receiving date from angularjs

Hi I am developing web application in angularjs. I have one date in angularjs for example 13-10-2017. In c# i have below field
public DateTime LicenseExpiryDate { get; set; }
When i send 13-10-2017 in ajax request,LicenseExpiryDate accepts as 0001-01-01. May i know how to fix this? I can see my angular date is in dd-mm-yy format and c# date default format is yyyy-mm-dd.
i tried to convert it to yyyy-mm-dd as below
function formatDateDOsetyymmdd(date) {
debugger;
var d = new Date(date),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = d.getFullYear();
if (month.length < 2) month = '0' + month;
if (day.length < 2) day = '0' + day;
return [year,month, day].join('-');
}
and this returns NaN-NaN-NaN
Any help would be appreciated. Thank you.

You are getting a string in form dd-mm-yyyy on input, what you want to do is turn that string into three numbers, and use those in the new Date call
function formatDateDOsetyymmdd(date) {
date = date.split('-').map(Number);
var d = new Date(date[2], date[1] - 1, date[0]),
month = '' + (d.getMonth() + 1),
day = '' + d.getDate(),
year = d.getFullYear();
if (month.length < 2) month = '0' + month;
if (day.length < 2) day = '0' + day;
return [year,month, day].join('-');
}
console.log(formatDateDOsetyymmdd('13-10-2017'));

you can use moment.js , if you can't do this in JavaScript means you can use it.
https://momentjs.com/

get date with of a day with respect to a given date

I am trying to get the date of a day with respect to a particular date. Suppose i give A=date(22/07/2014) and sunday as input then the output should be date of coming sunday with respect to A date here the output will be 27 july.
Thanks in advance
edit: merge comment
tried with
dayto=7;
var td = new Date();
var nextSunday= new Date( td.getFullYear(),
td.getMonth(),
td.getDate() + (dayto-td.getDay()) );
but it returns in respect to today's date and if i change td variable with any other date then it do not works

This will do the job
<script>
var days = ['Sunday','Monday','Tuesday','Wednesday','Thursday','Friday','Saturday'];
function findDayDate(date, dayInput) {
var d = new Date(Date.parse(date));
var day = days[ d.getDay() ];
while(true) {
if (day.toLowerCase() === dayInput.toLowerCase()) {
break;
} else {
d.setDate(d.getDate() + 1);
day = days[ d.getDay() ];
}
}
return d;
}
document.write(findDayDate("2005-07-08", "sunday"));
</script>

Convert EDT timestamp to PST with regex / JavaScript

A third party is providing me with an EDT time-stamp in the following format:
MM/DD/YYYY hh:mm
for instance: '08/19/2013 11:31'
I need to convert it to PST with JavaScript (same date time format) and have been looking all over but can't find any info about doing this.. If someone can help me with some example code I would really appreciate it.

If you wanted to do this manually, you can try the following:
Split by a space, so you have date and time.
Split the time by ":" and split the date by "/".
Create a new Date() and provide the right values in the right order.
Subtract 3 hours using the proper methods, then recreate the format.
Here's an example of all this:
var est = "01/01/2014 02:31",
finalDate, pst;
finalDate = parseDateString(est);
finalDate.setHours(finalDate.getHours() - 3);
pst = formatDate(finalDate);
console.log(pst);
function parseDateString(str) {
var dateTime, date, time, dateSplit, month, day, year, timeSplit, hour, minute;
dateTime = est.split(" ");
date = dateTime[0];
time = dateTime[1];
dateSplit = date.split("/");
month = dateSplit[0] - 1;
day = dateSplit[1];
year = dateSplit[2];
timeSplit = time.split(":");
hour = timeSplit[0];
minute = timeSplit[1];
return new Date(year, month, day, hour, minute);
}
function formatDate(d) {
return padZero(d.getMonth() + 1) + "/" + padZero(d.getDate()) + "/" + d.getFullYear() + " " + padZero(d.getHours()) + ":" + padZero(d.getMinutes());
}
function padZero(num) {
if (+num < 10) {
num = "0" + num;
}
return "" + num;
}
DEMO: http://jsfiddle.net/MmVmR/
The padZero function is there just to prepend any 0s in case the number is less than 10.
Reference:
Dates in JS - https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date

Javascript change date format from YYYY-MM-DD HH:MM:SS to MM-DD-YYYY [duplicate]

This question already has answers here:
Where can I find documentation on formatting a date in JavaScript?
(39 answers)
Closed 9 years ago.
I want to change YYYY-MM-DD HH:MM:SS to MM-DD-YYYY
Example:
I have a string which represents a date in this format: 2013-06-15 03:00:00
I want to change this string into 06-15-2013 using JavaScript.
Is there any library to do this? or should i just use JavaScript?

function change(time) {
var r = time.match(/^\s*([0-9]+)\s*-\s*([0-9]+)\s*-\s*([0-9]+)(.*)$/);
return r[2]+"-"+r[3]+"-"+r[1]+r[4];
}
change("2013-06-15 03:00:00");

see moment.js.. i found it very useful
http://momentjs.com/

DEMO: http://jsfiddle.net/abc123/f6k3H/1/
Javascript:
var d = new Date();
var c = new Date('2013-06-15 03:00:00');
alert(formatDate(c));
alert(formatDate(d));
function formatDate(d)
{
var month = d.getMonth();
var day = d.getDate();
month = month + 1;
month = month + "";
if (month.length == 1)
{
month = "0" + month;
}
day = day + "";
if (day.length == 1)
{
day = "0" + day;
}
return month + '-' + day + '-' + d.getFullYear();
}
Since this doesn't use RegEx you'll notice some weirdness....Examples:
d.getMonth() + 1
this is because getMonth is 0 indexed....
day = day + "";
if (day.length == 1)
{
day = "0" + day;
}
this is because hours, seconds, minutes all return 1 digit when they are 1 digit...this makes them return a leading 0. The same can be done to Month and Day if desired.