diff --git a/ChangeLog b/ChangeLog
index 78d1338443..8558a8abea 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -147,6 +147,14 @@
 	(ALTMON_11, ALTMON_12): Improve documentation.
 	* manual/time.texi (strftime): Likewise.
 
+2018-01-22  Rafal Luzynski  <digitalfreak@lingonborough.com>
+
+	[BZ #10871]
+	* localedata/locales/pl_PL: Alternative month names added,
+	primary month names are genitive now.
+	* time/tst-strptime.c (day_tests): Actually use a genitive case
+	of a month name in Polish language.
+
 2018-01-22  Rafal Luzynski  <digitalfreak@lingonborough.com>
 
 	[BZ #10871]