diff --git a/pep-0321.txt b/pep-0321.txt
index 687aea1e2..018a0a914 100644
--- a/pep-0321.txt
+++ b/pep-0321.txt
@@ -132,6 +132,7 @@ Other useful links:
 http://www.egenix.com/files/python/mxDateTime.html
 http://ringmaster.arc.nasa.gov/tools/time_formats.html
 http://www.thinkage.ca/english/gcos/expl/b/lib/0tosec.html
+https://moin.conectiva.com.br/DateUtil
 
 
 Copyright