parseDate.js

parse = function(input) {
    if (input instanceof Date) {
      return input;
    } else if (!isNaN(input)) {
      return new Date(input);
    } else if (/^\d+$/.test(input)) {
      return new Date(parseInt(input, 10));
    } else {
      var s = (input || '').trim();
      s = s.replace(/\.\d+/, ''); // remove milliseconds
      s = s.replace(/-/, '/').replace(/-/, '/');
      s = s.replace(/T/, ' ').replace(/Z/, ' UTC');
      s = s.replace(/([\+\-]\d\d)\:?(\d\d)/, ' $1$2'); // -04:00 -> -0400
      return new Date(s);
    }
  };