monolog/Logger.php

php app/console doctrine:schema:update --force problem

 [Symfony\Component\Debug\Exception\ContextErrorException]                    
  Warning: date_default_timezone_get(): 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 me  
  thods and you are still getting this warning, you most likely misspelled th  
  e timezone identifier. We selected 'Europe/Helsinki' for 'EET/2.0/no DST' i  
  nstead in /Users/arif/Documents/htdocs/proloterapi/vendor/monolog/monolog/s  
  rc/Monolog/Logger.php line 199