Формат даты обратного отсчета не работает должным образом javascript

My code is in javascript,html . Date of setting is not working properly. settings.date is incorrect. i would happy if anyone can help.

>      // CountDown Clock
>     // Version   : 1.0.1
>     // Developer : Ekrem KAYA
>     // Website   : http://e-piksel.com
>     // GitHub    : https://github.com/epiksel/countdown

(function ($) {

    'use strict';
    $.fn.countdown = function (options, callback) {
        var settings = $.extend({
            date: 12/13/2018 12:00:00.,
            offset: null,
            day: 'Day',
            days: 'Days',
            hour: 'Hour',
            hours: 'Hours',
            minute: 'Minute',
            minutes: 'Minutes',
            second: 'Second',
            seconds: 'Seconds'
        }, options);

!settings.date == is not showing correctly.

        // Throw error if date is not set
        if (!settings.date) {
            $.error('Date is not defined.');
        }

        // Throw error if date is set incorectly
        if (!Date.parse(settings.date)) {
            $.error('Incorrect date format, it should look like this, 12/24/2012 12:00:00.');
        }

        // Save container
        var container = this;

/** * Change client's local date to match offset timezone * @return {Object} Fixed Date object. */

        var currentDate = function () {
            // get client's current date
            var date = new Date();

            // turn date to utc
            var utc = date.getTime() + (date.getTimezoneOffset() * 60000);

            // set new Date object
            var new_date = new Date(utc + (3600000 * settings.offset));

            return new_date;
        };

/** * Main countdown function that calculates everything */

        function countdown() {
        //    alert("countdown");
            var target_date = new Date(settings.date), // set target date
                current_date = currentDate(); // get fixed current date
// alert(current_date);
// console.info(target_date);
console.info(settings.date);
            // difference of dates
            var difference = target_date - current_date;

            // if difference is negative than it's pass the target date
            if (difference < 0) {
                // stop timer
                clearInterval(interval);

                if (callback && typeof callback === 'function') callback();

                return;
            }

            // basic math variables
            var _second = 1000,
                _minute = _second * 60,
                _hour = _minute * 60,
                _day = _hour * 24;

            // calculate dates
            var days = Math.floor(difference / _day),
                hours = Math.floor((difference % _day) / _hour),
                minutes = Math.floor((difference % _hour) / _minute),
                seconds = Math.floor((difference % _minute) / _second);

            // based on the date change the refrence wording
            var text_days = (days === 1) ? settings.day : settings.days,
                text_hours = (hours === 1) ? settings.hour : settings.hours,
                text_minutes = (minutes === 1) ? settings.minute : settings.minutes,
                text_seconds = (seconds === 1) ? settings.second : settings.seconds;

            // fix dates so that it will show two digets
            days = (String(days).length >= 2) ? days : '0' + days;
            hours = (String(hours).length >= 2) ? hours : '0' + hours;
            minutes = (String(minutes).length >= 2) ? minutes : '0' + minutes;
            seconds = (String(seconds).length >= 2) ? seconds : '0' + seconds;
console.info(days,text_days);
            // set to DOM
            container.find('.days').text(days);
            container.find('.hours').text(hours);
            container.find('.minutes').text(minutes);
            container.find('.seconds').text(seconds);

            container.find('.days_text').text(text_days);
            container.find('.hours_text').text(text_hours);
            container.find('.minutes_text').text(text_minutes);
            container.find('.seconds_text').text(text_seconds);
        }

        // start
        var interval = setInterval(countdown, 1000);
    };

})(jQuery);