I get this error from my cronjob. How do I fix it? I'm running PHP ver. 5.2.17
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<b>Warning</b>: getdate() [<a href='function.getdate'>function.getdate</a>]: 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/Chicago' for 'CST/-6.0/no DST' instead in <b>/home/changed for security reasons/public_html/periodic/cron.php</b> on line <b>127</b><br />