jQuery Clock Customization

I'm using the jQuery clock code from this site and everything works great except I need the clock to always show Eastern Standard Time (GMT-5) instead of pulling the local time from the user's browser. How do I edit this code to function in that way?

Also, currently it displays the date as "Day Date Month Year." How to get it to display as "Day, Month Date, Year"

I'm a novice to jQuery so please provide specific steps/examples. Thank you so much for your help!

jQuery Code:

$(document).ready(function() {
// Create two variable with the names of the months and days in an array
var monthNames = [ "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" ]; 
var dayNames= ["Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday"]

// Create a newDate() object
var newDate = new Date();
// Extract the current date from Date object
newDate.setDate(newDate.getDate());
// Output the day, date, month and year    
$('#Date').html(dayNames[newDate.getDay()] + " " + newDate.getDate() + ' ' + monthNames[newDate.getMonth()] + ' ' + newDate.getFullYear());

setInterval( function() {
	// Create a newDate() object and extract the seconds of the current time on the visitor's
	var seconds = new Date().getSeconds();
	// Add a leading zero to seconds value
	$("#sec").html(( seconds < 10 ? "0" : "" ) + seconds);
	},1000);
	
setInterval( function() {
	// Create a newDate() object and extract the minutes of the current time on the visitor's
	var minutes = new Date().getMinutes();
	// Add a leading zero to the minutes value
	$("#min").html(( minutes < 10 ? "0" : "" ) + minutes);
    },1000);
	
setInterval( function() {
	// Create a newDate() object and extract the hours of the current time on the visitor's
	var hours = new Date().getHours();
	// Add a leading zero to the hours value
	$("#hours").html(( hours < 10 ? "0" : "" ) + hours);
    }, 1000);
	
}); 

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HTML Code:

<div class="container">
<div class="clock">
<div id="Date"></div>

<ul class="clock-ul">
    <li class="clock-li" id="hours"> </li>
    <li class="clock-li" id="point">:</li>
    <li class="clock-li" id="min"> </li>
    <li class="clock-li" id="point">:</li>
    <li class="clock-li" id="sec"> </li>
</ul>

</div>
</div>

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