Go to app-> config-> app.php in your laravel directory. On line 43, you can change the default time zone to whatever you need.
Laravel 4 by default:
'timezone' => 'UTC',
Your time zone:
'timezone' => 'America/Los_Angeles',
This change is applied to the database migration. In addition, if you need to set different time intervals based on your environment settings, just add the directory to the app-> config directory corresponding to the name of the environment you specified (ie - "production"). Place the duplicate "app.php" in your newly created directory and change the time zone setting on line 43 accordingly.
source share