jquery很久以前的服务器

server time : 15:00 time ago : 15:10

i wanna get this message [10 minutes ago]

but my laptop time is : 15:30 so i get [30 minutes ago]

Is there a solution ???

This is the code :

    <script>
        jQuery(document).ready(function() {
        jQuery("time.timeago").timeago();
        });
    </script>

<time style="float:right;margin:-20px 0 0 0;" class="timeago" 
      datetime="<?php echo $c_date; ?>"><?php echo $c_date; ?></time>