class.phpmailer.php Warning: date() [function.date]:

[Fbsd1]

Running Apache-1.3.41_1 PHP5-5.2.12 I did not get this message, which I 
now get running Apache/2.2.15 (FreeBSD) PHP/5.3.2
Is their way to stop this?

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 'Asia/Manila' for 
'PHT/8.0/no DST' instead in /usr/local/website/mlsax/class.phpmailer.php 
on line 1406