openfed-8.x-8.5/modules/openfed_features/partial_date/partial_date.routing.yml

partial_date_format.settings:
    path: 'admin/config/regional/partial-date-format/settings'
    defaults:
        _form: '\Drupal\partial_date\Form\PartialDateSettingsForm'
        _title: 'Manage partial date settings'
    requirements:
        _permission: 'administer site configuration'