The best solution is to update the timezone setting in the php.ini file for the site: http://www.inmotionhosting.com/support/website/php/setting-the-timezone-for-php-in-the-phpini-file
Alternatively you can set it on the page with the date_default_timezone_set() function: http://php.net/manual/en/function.date-default-timezone-set.php
or you can remove line 34 from the email body page.