primera prueba phpbb3, instalación local y salen errores

[joseanjim]

Buenas. Tengo un proyecto que necesita un foro y he optado por aprender a usar phpbb3. Como primer contacto, y dado que pierdo mi hosting actual en un mes, he optado por instalarlo en local. Tras algunos problemas con el CHMOD lo he logrado instalar, pero al ejecutarlo salen unos mensajes de error, aunque el foro aparentemente funciona...

[phpBB Debug] PHP Notice: in file /index.php on line 86: 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 'Europe/Paris' for '2.0/DST' instead
[phpBB Debug] PHP Notice: in file /index.php on line 86: getdate() [function.getdate]: 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 'Europe/Paris' for '2.0/DST' instead
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3824: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3247)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3826: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3247)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3827: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3247)
[phpBB Debug] PHP Notice: in file /includes/functions.php on line 3828: Cannot modify header information - headers already sent by (output started at /includes/functions.php:3247)

Gracias por leerme, saludos.