Develop Reference

Converting string m/dd/yyyy HH:MM:SS to date dd-mm-yyyy in Javascript

I have a string that looks like '1/11/2018 12:00:00 AM' and I want to reformat it to dd-mm-yyyy.
Keep in mind that the month can be double digit sometimes.

You can use libraries like moment.js. Assuming either you do not want to use any external library or can not use it, then you can use following custom method:
function formatDate(dateStr) {
let date = new Date(dateStr);
let day = date.getDate();
let month = date.getMonth() + 1;
let year = date.getFullYear();
return day + '-' + month + '-' + year;
}
console.log(formatDate('1/11/2018 12:00:00 AM'));

You can do somethink like this :
var d = new Date();
var curr_date = d.getDate();
var curr_month = d.getMonth() + 1; //Months are zero based
var curr_year = d.getFullYear();
console.log(curr_date + "-" + curr_month + "-" + curr_year);
However best way is with Moment.js,where you can Parse, Validate, Manipulate, and Display dates in JavaScript.
example:
var date= moment("06/06/2015 11:11:11").format('DD-MMM-YYYY');

function convertDate(oldDate) {
var myDate = new Date(Date.parse(oldDate)); //String -> Timestamp -> Date object
var day = myDate.getDate(); //get day
var month = myDate.getMonth() + 1; //get month
var year = myDate.getFullYear(); //get Year (4 digits)
return pad(day,2) + "-" + pad(month, 2) + "-" + year; //pad is a function for adding leading zeros
}
function pad(num, size) { //function for adding leading zeros
var s = num + "";
while (s.length < size) s = "0" + s;
return s;
}
convertDate("1/11/2018 12:00:00 AM"); //11-01-2018
Demo here

Javascript format date

I have a date string which coming from the db as follows
/Date(1469167371657)/
Is there any way to convert this date to following format using javascript
MM/DD/YYYY HH:MM
I've searched a lot but unble to find a solution

In plain javascript you have to write your own function for string format a date, for example for your string format:
var date = new Date(1469167371657);
function stringDate(date) {
var mm = date.getMonth()+1;
mm = (mm<10?"0"+mm:mm);
var dd = date.getDate();
dd = (dd<10?"0"+dd:dd);
var hh = date.getHours();
hh = (hh<10?"0"+hh:hh);
var min = date.getMinutes();
min = (min<10?"0"+min:min);
return mm+'/'+dd+'/'+date.getFullYear()+" "+hh+":"+min;
}
console.log(stringDate(date));
drier code version
var date = new Date(1469167371657);
function stringDate(date) {
return ("0" + (date.getMonth() + 1)).slice(-2)+'/'
+("0" + date.getDate()).slice(-2)+'/'
+date.getFullYear()+" "
+("0" + date.getHours()).slice(-2)+':'
+("0" + date.getMinutes()).slice(-2)
}
console.log(stringDate(date));

with pure js you can do the folowing
var d = new Date();
console.log(d.getMonth() + 1 + "/" + d.getDate() + "/" + d.getFullYear() + " " + d.getHours() + ":" + d.getMinutes())

You can use - http://momentjs.com/ and have it done like:
moment(1469167371657).format('MM/DD/YYYY HH:MM')

You can do this with the following steps:
1) convert the timestamp to a date object.
var timestamp = "/Date(1469167371657)/"; // However you want to save whatever comes from your database
timestamp = timestamp.substr(timestamp.indexOf("(")+1); // gives 1469167371657)/
timestamp = timestamp.substr(0,timestamp.indexOf(")")); // gives 1469167371657
var d = new Date(timestamp);
2) set it to your format
function leadZero(i) {if(i < 10) {return "0"+i;} return i;} // Simple function to convert 5 to 05 e.g.
var time = leadZero(d.getMonth()+1)+"/"+leadZero(d.getDate())+"/"+d.getFullYear()+" "+leadZero(d.getHours())+":"+leadZero(d.getMinutes());
alert(time);
Note: the date / timestamp you provided is too high for javascript to understand, so this example will not work correclty

I believe that number is milliseconds so to convert it to date, you would do this:
var time = new Date().getTime();
var date = new Date(time);
alert(date.toString()); // Wed Jan 12 2011 12:42:46 GMT-0800 (PST)
var time=1469167371657;
var date = new Date(time);
alert(date.toString());

Converting date format from mm/dd/yyyy to yyyy-mm-dd format after entered

In my datepicker the date will be inserted in mm/dd/yyyy format. But after I inserted I want it to be sent in yyyy-mm-dd format. I am using JavaScript to do this. But I wasn't able to do that. So what should I do?
Thanks & regards,
Chiranthaka

you could also use regular expressions:
var convertDate = function(usDate) {
var dateParts = usDate.split(/(\d{1,2})\/(\d{1,2})\/(\d{4})/);
return dateParts[3] + "-" + dateParts[1] + "-" + dateParts[2];
}
var inDate = "12/06/2013";
var outDate = convertDate(inDate); // 2013-12-06
The expression also works for single digit months and days.

I did the opposite for my website, but it might help you. I let you modify it in order to fit your requierements. Have fun !
getDate
getMonth
getFullYear
Have fun on W3Schools
var d = new Date();
var curr_date = d.getDate();
var curr_month = d.getMonth() + 1; //Months are zero based
var curr_year = d.getFullYear();
if(curr_month < 10)
curr_month = "0"+curr_month;
if(curr_date < 10)
curr_date = "0"+curr_date;
var curr_date_format = curr_date+"/"+curr_month+"/"+curr_year;

Adding more to Christof R's solution (thanks! used it!) to allow for MM-DD-YYYY (- in addition to /) and even MM DD YYYY. Slight change in the regex.
var convertDate = function(usDate) {
var dateParts = usDate.split(/(\d{1,2})[\/ -](\d{1,2})[\/ -](\d{4})/);
return dateParts[3] + "-" + dateParts[1] + "-" + dateParts[2];
}
var inDate = "12/06/2013";
var outDate = convertDate(inDate); // 2013-12-06
As Christof R says: This also works for single digit day and month as well.

// format from M/D/YYYY to YYYYMMDD
Date.prototype.yyyymmdd = function() {
var yyyy = this.getFullYear();
var mm = this.getMonth() < 9 ? "0" + (this.getMonth() + 1) : (this.getMonth() + 1); // getMonth() is zero-based
var dd = this.getDate() < 10 ? "0" + this.getDate() : this.getDate();
return "".concat(yyyy).concat(mm).concat(dd);
};
var siku = new Date();
document.getElementById("day").innerHTML = siku.yyyymmdd();

Convert input type text into date format

I have one input type text:
<input type="text" id="policyholder-dob" name="policyholder-dob" />
I want to type number in this field in mm/dd/yyyy format:
like 01/01/2014
This is my js code but its not working, what mistake have I made?
function dateFormatter(date) {
var formattedDate = date.getDate()
+ '/' + (date.getMonth() + 1) + '/' + date.getFullYear();
return formattedDate;
}
var nextduedate = $("#policyholder-dob").val();
var dateFormatDate = nextduedate.slice(0, 2);
var dateFormatMonth = nextduedate.slice(2, 4);
var dateFormatYear = nextduedate.slice(4, 8);
var totalFormat = dateFormatMonth + '/' + dateFormatDate + '/' + dateFormatYear;
var againNewDate = new Date(totalFormat);
againNewDate.setDate(againNewDate.getDate() + 1);
var todaydate = dateFormatter(againNewDate);
$("#policyholder-dob").prop("value", todaydate);
Any help will be really appreciated.

Thankfully, your input is consistently in this format:
mm/dd/yyyy
So you can convert it to a Date object through a custom function, such as:
function stringToDate(str){
var date = str.split("/"),
m = date[0],
d = date[1],
y = date[2],
temp = [];
temp.push(y,m,d);
return (new Date(temp.join("-"))).toUTCString();
}
Or:
function stringToDate(str){
var date = str.split("/"),
m = date[0],
d = date[1],
y = date[2];
return (new Date(y + "-" + m + "-" + d)).toUTCString();
}
Etc..
Calling it is easy:
stringToDate("12/27/1963");
And it will return the correct timestamp in GMT (so that your local timezone won't affect the date (EST -5, causing it to be 26th)):
Fri, 27 Dec 1963 00:00:00 GMT //Late december
Example
There are various ways to accomplish this, this is one of them.

I'd suggest moment.js for date manipulation. You're going to run into a world of hurt if you're trying to add 1 to month. What happens when the month is December and you end up with 13 as your month. Let a library handle all of that headache for you. And you can create your moment date with the string that you pull from the val. You substrings or parsing.
var d = moment('01/31/2014'); // creates a date of Jan 31st, 2014
var duration = moment.duration({'days' : 1}); // creates a duration object for 1 day
d.add(duration); // add duration to date
alert(d.format('MM/DD/YYYY')); // alerts 02/01/2014
Here's a fiddle showing it off.

Convert date in javascript

How can I convert this date:
2011-11-02T10:41:43+0000
Into this using JavaScript:
02/11
Thankful for all help!

If that date is a string, a simple RegEx can offer the desired results:
var date = "2011-11-02T10:41:43+0000";
date = date.match(/-(\d{1,2})-(\d{1,2})T/);
date = date[2] + "/" + date[1]; // date = "02/11"

var d = new Date('2011-11-02T10:41:43+0000'),
dateString = d.getDate()+'/'+(d.getMonth()+1);
console.log(dateString); // 2/11

You could do this
var d = new Date('2011-11-02T10:41:43+0000');
var e = d.getUTCDate() + '/' + (d.getUTCMonth() + 1);
alert(e);
Example: http://jsfiddle.net/pRbZ2/
Assuming that the 11 you want is the month and not the year