'#title' => $this->t('Default time zone'),
// Use system timezone if set, but avoid throwing a warning in PHP >=5.4
'#default_value' => @date_default_timezone_get(),
- '#options' => system_time_zones(),
+ '#options' => system_time_zones(NULL, TRUE),
'#description' => $this->t('By default, dates in this site will be displayed in the chosen time zone.'),
'#weight' => 5,
'#attributes' => ['class' => ['timezone-detect']],