fix datepicker helper hidden field value

app/helpers/orbit_form_helper.rb

@@ -22,7 +22,7 @@ module OrbitFormHelper
       options[:label] ||= I18n.t('datetime_picker.separated.label')
       content_tag :div, :id => options[:id], :class => "separated_picker #{options[:class]}" do
         concat label_tag options[:label] unless options[:no_label]
-        concat hidden_field(object_name, method)
+        concat hidden_field(object_name, method, :value => options[:value])
         concat separated_picker(object_name, method, options)
       end
     else