Modify the default PHP timezone
Before running the commands shown on this page, you should load the Bitnami stack environment by executing the installdir/use_APPNAME script (Linux and Mac OS X) or by clicking the shortcut in the Start Menu under “Start -> Bitnami APPNAME Stack -> Application console” (Windows). Learn more.
The default timezone is “America/Los_Angeles” but you can change it in the php.ini file, as shown below:
[Date] date.timezone = "America/Los_Angeles"
You can see all available timezones at http://php.net/manual/en/timezones.php.