diff --git a/config b/config
index 399d6d9e..98e13af2 100644
--- a/config
+++ b/config
@@ -320,6 +320,9 @@
 # Share collection by map
 #collection_by_map = false
 
+# Share collection by bday (conversion on-the-fly)
+#collection_by_bday = false
+
 # Permit create of token-based sharing
 #  If False it can be explicitly granted by permissions: t
 #  If True it can be explicitly forbidden by permissions: T
@@ -330,6 +333,11 @@
 #  If True it can be explicitly forbidden by permissions: M
 #permit_create_map = false
 
+# Permit create of bday-based sharing
+#  If False it can be explicitly granted by permissions: b
+#  If True it can be explicitly forbidden by permissions: B
+#permit_create_bday = false
+
 # Permit properties overlay
 #  If False it can be explicitly granted by share permissions: P
 #  If True it can be explicitly forbidden by share permissions: p