Note: this list is generated by looking for the string for this theme hook, so it may include some references that are not actually using this theme hook.

DateFieldBasic::createDateField in core/modules/date/tests/date_field.test
Creates a date field from an array of settings values.
DateFieldBasic::createMultiDateField in core/modules/date/tests/date_field.test
Creates a date field from an array of settings values.
DateFieldTestCase::dateForm in core/modules/date/tests/date_field.test
Tests that date field functions properly on the node form.
DateFieldTestCase::testField in core/modules/date/tests/date_field.test
@todo.
DateUITestCase::dateForm in core/modules/date/tests/date.test
DateUITestCase::testFieldUI in core/modules/date/tests/date.test
DateValidationTestCase::checkGranularity in core/modules/date/tests/date_validation.test
Confirms that fields missing the time granularity are accepted.
DateValidationTestCase::malFormedDate in core/modules/date/tests/date_validation.test
Attempt to create a node with a malformed date and ensure it fails.
DateValidationTestCase::testValidation in core/modules/date/tests/date_validation.test
Test validation on each type of date widget.
DateViewsTestCase::testDateViewsFields in core/modules/date/tests/date_views.test
date_combo_element_process in core/modules/date/date.elements.inc
Process an individual date element.
date_field_info in core/modules/date/date.field.inc
Implements hook_field_info().
date_field_widget_info in core/modules/date/date.field.inc
Implements hook_field_widget_info().
date_field_widget_properties_alter in core/modules/date/date.module
Implements hook_field_widget_properties_alter().
date_select_element_process in core/modules/date/date.elements.inc
Flexible date/time drop-down selector.
date_theme in core/modules/date/date.module
Implements hook_theme().
date_views_filter_handler_simple::option_definition in core/modules/date/views/date_views_filter_handler_simple.inc
Information about options for all kinds of purposes will be held here. @code 'option_name' => array(
date_views_filter_handler_simple::value_form in core/modules/date/views/date_views_filter_handler_simple.inc
Add the selectors to the value form using the date handler.
date_views_filter_handler_simple::widget_options in core/modules/date/views/date_views_filter_handler_simple.inc
Date selection options.
_date_element_info in core/modules/date/date.elements.inc
Implements hook_element_info().
_date_field_widget_settings_form in core/modules/date/date.admin.inc
Helper function for date_field_widget_settings_form().