DateViewsTestCase::testDateViewsFields in core/modules/date/tests/date_views.test

date_views_argument_handler::admin_summary in core/modules/date/views/date_views_argument_handler.inc

Provide text for the administrative summary

date_views_argument_handler::get_query_fields in core/modules/date/views/date_views_argument_handler.inc

Collect information about our fields we will need to create the right query.

date_views_argument_handler::options_form in core/modules/date/views/date_views_argument_handler.inc

Add a form element to select date_fields for this argument.

date_views_argument_handler_simple::query in core/modules/date/views/date_views_argument_handler_simple.inc

Inject a test for valid date range before the regular query.

date_views_filter_handler::admin_summary in core/modules/date/views/date_views_filter_handler.inc

Display the filter on the administrative summary

date_views_filter_handler::extra_options_form in core/modules/date/views/date_views_filter_handler.inc

Provide a form for setting options.

date_views_filter_handler::get_query_fields in core/modules/date/views/date_views_filter_handler.inc

date_views_filter_handler_simple::op_contains in core/modules/date/views/date_views_filter_handler_simple.inc