DOC add date for 0.20.0 release
@@ -215,7 +215,7 @@ Miscellaneous
Version 0.20.0
==============
-**September, 2018**
+**September 25, 2018**
This release packs in a mountain of bug fixes, features and enhancements for
the Scikit-learn library, and improvements to the documentation and examples.
