A node.js package for Steven Levithan's excellent dateFormat() function. 

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 * Includes enhancements by Scott Trenda <scott.trenda.net>

 * and Kris Kowal <cixar.com/~kris.kowal/>

 * Accepts a date, a mask, or a date and a mask.

 * Returns a formatted version of the given date.

 * The date defaults to the current date/time.

 * The mask defaults to dateFormat.masks.default.

	var	token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZW]|"[^"]*"|'[^']*'/g,

	var	token = /d{1,4}|m{1,4}|yy(?:yy)?|([HhMsTt])\1?|[LloSZWN]|"[^"]*"|'[^']*'/g,

		timezone = /\b(?:[PMCEA][SDP]T|(?:Pacific|Mountain|Central|Eastern|Atlantic) (?:Standard|Daylight|Prevailing) Time|(?:GMT|UTC)(?:[-+]\d{4})?)\b/g,

			while (val.length < len) val = "0" + val;

     * http://techblog.procurios.nl/k/n618/news/view/33796/14863/Calculate-ISO-8601-week-and-year-in-javascript.html

      var targetThursday = new Date(date.getFullYear(), date.getMonth(), date.getDate());

      // Change date to Thursday same week

      targetThursday.setDate(targetThursday.getDate() - ((targetThursday.getDay() + 6) % 7) + 3);

      // Take January 4th as it is always in week 1 (see ISO 8601)

      var firstThursday = new Date(targetThursday.getFullYear(), 0, 4);

      firstThursday.setDate(firstThursday.getDate() - ((firstThursday.getDay() + 6) % 7) + 3);

      // Check if daylight-saving-time-switch occured and correct for it

      var ds = targetThursday.getTimezoneOffset() - firstThursday.getTimezoneOffset();

      targetThursday.setHours(targetThursday.getHours() - ds);

      // Number of weeks between target Thursday and first Thursday

      var weekDiff = (targetThursday - firstThursday) / (86400000*7);

     * Get ISO-8601 numeric representation of the day of the week

     * 1 (for Monday) through 7 (for Sunday)

	// Regexes and supporting functions are cached through closure

		// You can't provide utc if you skip other args (use the "UTC:" mask prefix)

		if (arguments.length == 1 && Object.prototype.toString.call(date) == "[object String]" && !/\d/.test(date)) {

		mask = String(dF.masks[mask] || mask || dF.masks["default"]);

		// Allow setting the utc argument via the mask

			o = utc ? 0 : date.getTimezoneOffset(),

				L:    pad(L > 99 ? Math.round(L / 10) : L),

				Z:    utc ? "UTC" : (String(date).match(timezone) || [""]).pop().replace(timezoneClip, ""),

				o:    (o > 0 ? "-" : "+") + pad(Math.floor(Math.abs(o) / 60) * 100 + Math.abs(o) % 60, 4),

				S:    ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10],

		return mask.replace(token, function ($0) {

			return $0 in flags ? flags[$0] : $0.slice(1, $0.length - 1);

	"default":      "ddd mmm dd yyyy HH:MM:ss",

	isoDateTime:    "yyyy-mm-dd'T'HH:MM:ss",

	isoUtcDateTime: "UTC:yyyy-mm-dd'T'HH:MM:ss'Z'"

		"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",

		"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"

		"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",

		"January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December"

Date.prototype.format = function (mask, utc) {

  "description": "A node.js package for Steven Levithan's excellent dateFormat() function.",

  "maintainers": "Felix Geisendörfer <felix@debuggable.com>",

  "homepage": "https://github.com/felixge/node-dateformat",

    "Felix Geisendörfer <felix@debuggable.com>",

A node.js package for Steven Levithan's excellent [dateFormat()][dateformat] function.

* Removed the `Date.prototype.format` method. Sorry folks, but extending native prototypes is for suckers.

* Added a `module.exports = dateFormat;` statement at the bottom

* Added the placeholder `N` to get the ISO 8601 numeric representation of the day of the week

As taken from Steven's post, modified to match the Modifications listed above:

    var dateFormat = require('dateformat');

    dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT");

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

    // You can use one of several named masks

    dateFormat.masks.hammerTime = 'HH:MM! "Can\'t touch this!"';

    // When using the standalone dateFormat function,

    // you can also provide the date as a string

    dateFormat("Jun 9 2007", "fullDate");

    // Note that if you don't include the mask argument,

    // And if you don't include the date argument,

    // You can also skip the date argument (as long as your mask doesn't

    // contain any numbers), in which case the current date/time is used

    // And finally, you can convert local time to UTC time. Simply pass in

    // true as an additional argument (no argument skipping allowed in this case):

    // ...Or add the prefix "UTC:" to your mask.

    // You can also get the ISO 8601 week of the year:

    // and also get the ISO 8601 numeric representation of the day of the week:

[dateformat]: http://blog.stevenlevithan.com/archives/date-time-format

[stevenlevithan]: http://stevenlevithan.com/

		@@ -16,3 +16,3 @@ /*
		var dateFormat = function () {
		var token = /d{1,4}\|m{1,4}\|yy(?:yy)?\|([HhMsTt])\1?\|[LloSZW]\|"[^"]"\|'[^']'/g,
		var token = /d{1,4}\|m{1,4}\|yy(?:yy)?\|([HhMsTt])\1?\|[LloSZWN]\|"[^"]"\|'[^']'/g,
		timezone = /\b(?:[PMCEA][SDP]T\|(?:Pacific\|Mountain\|Central\|Eastern\|Atlantic) (?:Standard\|Daylight\|Prevailing) Time\|(?:GMT\|UTC)(?:[-+]\d{4})?)\b/g,
		@@ -51,2 +51,13 @@ timezoneClip = /[^-+\dA-Z]/g,
		return 1 + weekDiff;
		},

		/**
		* Get ISO-8601 numeric representation of the day of the week
		* 1 (for Monday) through 7 (for Sunday)
		*/

		getDayOfWeek = function(date){
		var dow = date.getDay();
		if(dow === 0) dow = 7;
		return dow;
		};
		@@ -93,2 +104,3 @@
		W = getWeek(date),
		N = getDayOfWeek(date),
		flags = {
		@@ -122,3 +134,4 @@ d: d,
		S: ["th", "st", "nd", "rd"][d % 10 > 3 ? 0 : (d % 100 - d % 10 != 10) * d % 10],
		W: W
		W: W,
		N: N
		};
		@@ -125,0 +138,0 @@

		@@ -12,3 +12,3 @@ {
		],
		"version": "1.0.4-1.2.3",
		"version": "1.0.5-1.2.3",
		"main": "./lib/dateformat",
		@@ -15,0 +15,0 @@ "dependencies": {},

		@@ -9,2 +9,3 @@ # dateformat
		* Added a `module.exports = dateFormat;` statement at the bottom
		* Added the placeholder `N` to get the ISO 8601 numeric representation of the day of the week

		@@ -63,2 +64,7 @@ ## Usage
		// 42

		// and also get the ISO 8601 numeric representation of the day of the week:
		dateFormat(now,"N");
		// 6

		## License
		@@ -65,0 +71,0 @@

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