Notice: date_default_timezone_set() []: Timezone ID 'UTC' is invalid in /var/www/magento/app/Mage.php on line 690

Strict Standards: strtotime() [function.strtotime]: 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 'UTC' for 'UTC/0.0/no DST' instead in /var/www/magento/app/Mage.php on line 691

Fatal error: strtotime() [<a href='function.strtotime'>function.strtotime</a>]: Timezone database is corrupt - this should *never* happen! in /var/www/magento/app/Mage.php on line 691