diff --git a/README.md b/README.md
index 77910d2..ab47064 100644
--- a/README.md
+++ b/README.md
@@ -86,6 +86,7 @@ Most variables are the same as in the [official postgres image](https://hub.dock
 | POSTGRES_USER | Postgres connection parameter; postgres user to connect with. Required. |
 | POSTGRES_USER_FILE | Alternative to POSTGRES_USER, for usage with docker secrets. |
 | SCHEDULE | [Cron-schedule](http://godoc.org/github.com/robfig/cron#hdr-Predefined_schedules) specifying the interval between postgres backups. Defaults to `@daily`. |
+| TZ | [POSIX TZ variable](https://www.gnu.org/software/libc/manual/html_node/TZ-Variable.html) specifying the timezone used to evaluate SCHEDULE cron (example "Europe/Paris"). |
 
 #### Special Environment Variables