diff --git a/widget/nsIDatePicker.idl b/widget/nsIDatePicker.idl
index 0263dc857..e0dfa0f24 100644
--- a/widget/nsIDatePicker.idl
+++ b/widget/nsIDatePicker.idl
@@ -59,6 +59,13 @@ interface nsIDatePicker : nsISupports
   */
   attribute AString maxDate;
 
+ /**
+  * The selected date.
+  *
+  * @return Returns the date currently selected.
+  */
+  readonly attribute AString selectedDate;
+
  /**
   * Show date dialog. The dialog is displayed modally.
   *