When you run cakephp application, may be you meet the follow error:
  Warning: strtotime(): 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 the timezone 'UTC' for now, but please set date.timezone to select your timezone. in /var/www/cakephp/lib/Cake/Cache/CacheEngine.php on line 60

It's not  CakePHP bug, just a warning if your server runs PHP 5.3+. To solve that problem, You can find in app/config/core.php at line 270 
/** Uncomment this line and correct your server timezone to fix
 *any date & time related errors.
 */
 date_default_timezone_set('UTC');
Uncomment or set into your timezone you like.

Or you can config it in php.ini file  

[Date]

; Defines the default timezone used by the date functions

; http://php.net/date.timezone

date.timezone = Asia/Tokyo