Parse UTC date string in ISO 8601 format

annotated.js

function (
    s // ISO 8601 UTC date in yyyy-MM-dd'T'HH:mm:ss.SSS'Z' format,
    t // Placeholder
) {
    t = /(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)\.(\d{3})Z/
        .exec(s) // Parse tokens
        .slice(1); // Discard matched string
    --t[1]; // Fix month

    return new Date(
        Date.UTC.apply(0, t) // get milliseconds since epoch for date components in UTC
    )
}

index.js

function(s,t){t=/(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)\.(\d{3})Z/.exec(s).slice(1);--t[1];return new Date(Date.UTC.apply(0,t))}

LICENSE.txt

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2011 Ates Goral <http://magnetiq.com>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

package.json

{
  "name": "parseIsoDate",
  "keywords": [ "date", "parse", "iso8601" ]
}

test.js

var parseIsoDate = function(s,t){t=/(\d{4})-(\d\d)-(\d\d)T(\d\d):(\d\d):(\d\d)\.(\d{3})Z/.exec(s).slice(1);--t[1];return new Date(Date.UTC.apply(0,t))};

console.log(parseIsoDate("2011-05-21T05:23:42.123Z").toUTCString());
    // Sat, 21 May 2011 05:23:42 GMT