Countdown timer not calculating correctly

Ok, SO I have the quickstart installed and up an running. The counter is working, but it is displaying the wrong times. I've edited the two instances as shown, but the timer is way off. What am I doing wrong here?

This is my code:
<div class="gk-animation" data-height="530">
<div class="gk-animation-wrap">

<div class="gka-bg">Background</div>
<h2 class="gk-scale-up" data-start="{'opacity':0}" data-end="{'opacity':1}" data-delay="200" data-time="500">Chattahoochee River Country Music Festival 24 July. - 26 July. 2015</h2>
<h1 class="gk-scale-up" data-start="{'opacity':0}" data-end="{'opacity':1}" data-delay="600" data-time="500">Countdown</h1>
<div class="gk-stars" data-start="{'opacity':0}" data-end="{'opacity':1}" data-delay="1000" data-time="500">* * * * * *</div>
<div class="gk-jscounter gk-scale-up" data-dateend="7-24-2015" data-timeend="00:00" data-timezone="-5" data-start="{'opacity':0}" data-end="{'opacity':1}" data-delay="900" data-time="500">Counting finished!</div>
<div class="gk-guitar" data-start="{'opacity': 0, 'right': '-200px'}" data-end="{'opacity': 1, 'right': 0}" data-delay="900" data-time="450">Guitar</div>
<a href="http://crcmf.com/?post_type=product" class="gk-ticket" data-start="{'opacity':0, 'top': '45px'}" data-end="{'opacity':1, 'top': 0}" data-delay="1300" data-time="450">
<strong>Get a ticket</strong>
<small>Come Join Us!</small>
</a>

</div>
</div>

...................................

this is what shows up

Hello,

Please check this article:
https://demo.gavick.com/wordpress/fest/?p=918

The dataend attribute is in D-M-Y format, please change it and check again.

Hi, i have read the explanation in the link provided, but i am not a developer and i feel its quite complex especially when it comes to additional responsive edits, is there not one place where i can go to edit the date so the counter re activates and will render responsive?

thankyou Keith

i would have expected this to be a widget but can find it

Hi, Did you check this article? https://demo.gavick.com/wordpress/fest/?p=918
It's a widget, Text widget with the content from the article (first fragment of code), if you are using a quickstart package you should find this widget in Header widget area:
https://www.gavick.com/documentation/wp ... text-4.png

Thankyou it was as simple as i hoped