added empty_value

Nyholm · Nyholm · commit a5c5f279e28b · 2013-07-11T15:27:31.000+02:00
diff --git a/reference/forms/types/birthday.rst b/reference/forms/types/birthday.rst
@@ -24,6 +24,7 @@ option defaults to 120 years ago to the current year.
 +----------------------+-------------------------------------------------------------------------------+
 | Inherited Options    | - `widget`_                                                                   |
 |                      | - `input`_                                                                    |
+|                      | - `empty_value`_                                                              |  
 |                      | - `months`_                                                                   |
 |                      | - `days`_                                                                     |
 |                      | - `format`_                                                                   |
@@ -61,6 +62,8 @@ These options inherit from the :doc:`date</reference/forms/types/date>` type:
     
 .. include:: /reference/forms/types/options/date_input.rst.inc
 
+.. include:: /reference/forms/types/options/empty_value.rst.inc
+
 .. include:: /reference/forms/types/options/months.rst.inc
 
 .. include:: /reference/forms/types/options/days.rst.inc
