diff --git a/wcs/fields.py b/wcs/fields.py
index 8fcee4b29..c9adbb8b8 100644
--- a/wcs/fields.py
+++ b/wcs/fields.py
@@ -1757,7 +1757,7 @@ class ItemField(WidgetField, MapOptionsMixin, ItemFieldMixin):
                 value=self.initial_date_alignment,
                 validation_function=ComputedExpressionWidget.validate_template,
                 attrs={'data-dynamic-display-child-of': 'display_mode',
-                       'data-dynamic-display-value': 'datetimes'})
+                       'data-dynamic-display-value': 'timetable'})
         self.fill_zoom_admin_form(form,
                 attrs={'data-dynamic-display-child-of': 'display_mode',
                        'data-dynamic-display-value': 'map'})