[Problema] [Ayuda] Tengo un error que me sale siempre en cada pagina

Buenos dias o tardes, soy nuevo en el mundo de la web mas que todo, inicie mi servidor con un gesior que la verdad me va muy bien, pero la cosa es que me sale un error en cada pagina que entre y no tengo idea de como resolverlo.

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/Halifax' for '-4.0/no DST' instead in C:\xampp\htdocs\pages\whoisonline.php on line 7

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/Halifax' for '-4.0/no DST' instead in C:\xampp\htdocs\pages\whoisonline.php on line 8

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/Halifax' for '-4.0/no DST' instead in C:\xampp\htdocs\pages\whoisonline.php on line 160



Siempre me sale eso, necesito ayuda con eso plis

agregue esto a su index.php

error_reporting(0);

gracias bro un millon