"It is not safe to rely on the system's timezone settings"

I have a script that I completed a week ago, without any problem or bug. Today, I tested it again and I received these messages:

Strict Standards: date() [function.date]: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable 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/London' for '1.0/DST' instead in C:\Users\xx\VertrigoServ\www\login\PHPMailer\class.phpmailer.php on line 1925

Strict Standards: date() [function.date]开发者_如何转开发: It is not safe to rely on the system's timezone settings. Please use the date.timezone setting, the TZ environment variable 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/London' for '1.0/DST' instead in C:\Users\xx\VertrigoServ\www\login\PHPMailer\class.phpmailer.php on line 1929

I already set in the php.ini ;date.timezone = "Europe/Lisbon" and the same occurs. I've already restart the server

Any ideas?

In php.ini, ; comments out a line, so ;date.timezone = "Europe/Lisbon" does nothing. Uncomment that line by removing that preceding ; and restart Apache.

Why not do the following:?

date_default_timezone_set('Europe/Lisbon');