Configure the default 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.
You can set the default timezone in the main installdir/php/etc/php.ini file:
date.timezone = "America/LosAngeles"
This option can be also configured in the Mantis preferences panel. After changing this value, restart the Apache server:
$ sudo installdir/ctlscript.sh restart apache