diff --git a/README.md b/README.md
index 489eb26..bb4d7b8 100644
--- a/README.md
+++ b/README.md
@@ -13,6 +13,7 @@ unzip weather-image.tar.zip
 Lataa kontti Dockeriin:
 sudo docker load -i weather-image.tar
 
+https://en.wikipedia.org/wiki/List_of_tz_database_time_zones
 Käynnistä kontti:
 sudo docker run -d --name weather -e LATITUDE="61.4981" -e LONGITUDE="23.7608" -e MAX_RESULTS="10" -e TZ="Europe/Helsinki" -p 8600:80 weather-image