BackdropWebTestCase::setUp in core/modules/simpletest/backdrop_web_test_case.php
Sets up a Backdrop site for running functional and integration tests.
install_configure_form_submit in core/includes/
Form submission handler for install_configure_form().
system_regional_settings in core/modules/system/
Form builder; Configure the site regional settings.
system_regional_settings_submit in core/modules/system/
Form submission handler for regional settings.
system_update_1020 in core/modules/system/system.install
Convert date settings to config.
_install_configure_form in core/includes/
Form constructor for a site configuration form.