How to format a JavaScript date

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How can I format a JavaScript date object to print as 10-Aug-2010?

First answer

Attention: There are better answers below. This answer was written in 2010 and newer and better solutions have arrived since. The OP should accept another answer.

function formatDate(date) {
  var monthNames = [
    "January", "February", "March",
    "April", "May", "June", "July",
    "August", "September", "October",
    "November", "December"
  ];

  var day = date.getDate();
  var monthIndex = date.getMonth();
  var year = date.getFullYear();

  return day + ' ' + monthNames[monthIndex] + ' ' + year;
}

console.log(formatDate(new Date()));  // show current date-time in console

You can edit the array monthNames to use Jan, Feb, Mar, etc..

Second answer

Use toLocaleDateString()

The toLocaleDateString() method returns a string with a language-sensitive representation of the date portion of the date. The locales and options arguments let applications specify the language whose formatting conventions should be used and allow to customize the behavior of the function.

The values you can passed in options for different keys:

  1. day:
    The representation of the day.
    Possible values are “numeric”, “2-digit”.
  2. weekday:
    The representation of the weekday.
    Possible values are “narrow”, “short”, “long”.
  3. year:
    The representation of the year.
    Possible values are “numeric”, “2-digit”.
  4. month:
    The representation of the month.
    Possible values are “numeric”, “2-digit”, “narrow”, “short”, “long”.
  5. hour:
    The representation of the hour.
    Possible values are “numeric”, “2-digit”.
  6. minute:
    The representation of the minute.
    Possible values are “numeric”, “2-digit”.
  7. second:
    The representation of the second.
    Possible values are “numeric”, 2-digit”.

All these keys are optional. You can change the number of options values based on your requirements, and this will also reflect the presence of each date time term.

Note: If you would only like to configure the content options, but still use the current locale, passing null for the first parameter will cause an error. Use undefined instead.

For different languages:

  1. “en-US”: For English
  2. “hi-IN”: For Hindi
  3. “ja-JP”: For Japanese

You can use more language options.

For example

var options = { weekday: 'long', year: 'numeric', month: 'long', day: 'numeric' };
var today  = new Date();

console.log(today.toLocaleDateString("en-US")); // 9/17/2016
console.log(today.toLocaleDateString("en-US", options)); // Saturday, September 17, 2016
console.log(today.toLocaleDateString("hi-IN", options)); // शनिवार, 17 सितंबर 2016

You can also use the toLocaleString() method for the same purpose. The only difference is this function provides the time when you don’t pass any options.

// Example
9/17/2016, 1:21:34 PM

References:

Third answer

Use the date.format library:

var dateFormat = require('dateformat');
var now = new Date();
dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT");

returns:

Saturday, June 9th, 2007, 5:46:21 PM 

dateformat on npm

http://jsfiddle.net/phZr7/1/

Reprint:https://stackoverflow.com/questions/3552461/how-to-format-a-javascript-date
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