date_default_timezone_set()

php version 5.3x

I've received the following error message while running php 5.3x. Downgrading to v5.2x has resolved the issue.

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 'EDT/-4.0/DST' instead in /home/www/album/main.php on line 99