« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: eval() [function.eval]: 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/Los_Angeles' for 'PDT/-7.0/DST' instead 
  Error type/ Nr.: Warning - 2 
  File: /home/acmmao5/public_html/manager/includes/document.parser.class.inc.php(766) : eval()'d code 
  Line: 27 
 
Parser timing
  MySQL: 0.0244 s(3 Requests)
  PHP: 0.0088 s 
  Total: 0.0332 s