diff --git a/po/ja.po b/po/ja.po
index 6d7d28f0ab..f15551eec7 100644
--- a/po/ja.po
+++ b/po/ja.po
@@ -1324,7 +1324,7 @@ msgstr "3 月"
 #. l10n: Short month name
 #: js/messages.php:167 libraries/common.lib.php:1574
 msgid "Apr"
-msgstr "9 月"
+msgstr "4 月"
 
 #. l10n: Short month name
 #: js/messages.php:169 libraries/common.lib.php:1576