Captcha generating warning messages from posts

Feb 13, 2015 at 7:59 PM
Can anyone help with this please?

http://www.tremedoc.com/comments/


Warning: date() [function.date]: It is not safe to rely on the system's timezone settings. You are required to use the date.timezone setting or the date_default_timezone_set() function. In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identifier. We selected 'America/New_York' for 'EST/-5.0/no DST' instead in /home/lucief/public_html/comments_display.php on line 15