diff --git a/generate_calendar_dates.php b/generate_calendar_dates.php
index d053b14..d725364 100644
--- a/generate_calendar_dates.php
+++ b/generate_calendar_dates.php
@@ -79,6 +79,12 @@
             ),
         ),
     ),
+    # This represents the whole year from start to finish.
+    'YY' => array(
+        'first_week'  => 1,
+        'last_week'   => 52,
+        'break_weeks' => array(),
+    ),
 );