diff --git a/tabellio/searchform/cmpfunctions.py b/tabellio/searchform/cmpfunctions.py
index deca707..71448db 100644
--- a/tabellio/searchform/cmpfunctions.py
+++ b/tabellio/searchform/cmpfunctions.py
@@ -112,5 +112,7 @@ class Cmp:
             t = -cmp(get_no_as_int(x.no), get_no_as_int(y.no))
             if t == 0 and hasattr(x, 'nodoc'):
                 t = cmp(x.nodoc, y.nodoc)
+            elif t == 0 and hasattr(x, 'date'):
+                t = cmp(x.date, y.date)
         return t