Those using CodeIgniter on a PHP 5.3 installation might have noticed some error messages related to the datetime handling when you use related functions. Phil Sturgeon has a solution for you to get rid of those pesky messages.

Last night I set up Zend Community Server with PHP 5.3 and gave PyroCMS (running CodeIgniter 1.7.2) a spin. Out of the box v0.9.7.3 and v0.9.8-dev seemed to work fine, except for a single Warning at the top of each page. [...] To fix this, you only need to edit the main index.php for your CodeIgniter application.

He includes the code for a new section that sets the default timezone for the application and, if you want to help suppress errors like this in the future, he also shows how to change the error_reporting level. You can slo change these settings in the php.ini file, but this is a good per-application way to update those settings.