diff --git a/bl-languages/de_CH.json b/bl-languages/de_CH.json
index 5bf783d9..a03385df 100644
--- a/bl-languages/de_CH.json
+++ b/bl-languages/de_CH.json
@@ -35,6 +35,7 @@
         "Feb": "Feb",
         "Mar": "Mär",
         "Apr": "Apr",
+	"May": "Mai",
         "Jun": "Jun",
         "Jul": "Jul",
         "Aug": "Aug",