diff --git a/mailcow/common-settings.yml b/mailcow/common-settings.yml
index 9fd26d7..65bf9dc 100644
--- a/mailcow/common-settings.yml
+++ b/mailcow/common-settings.yml
@@ -1,7 +1,7 @@
 services:
     common-settings:
         environment:
-            TZ: "${TIMEZONE:-Etc/UTC}"
+            TZ: "${TZ:-Etc/UTC}"
         logging:
             driver: "json-file"
             options:
diff --git a/mailcow/env/fully.qualified.domain.name.example b/mailcow/env/fully.qualified.domain.name.example
index 427163a..92c1f77 100644
--- a/mailcow/env/fully.qualified.domain.name.example
+++ b/mailcow/env/fully.qualified.domain.name.example
@@ -1,8 +1,8 @@
 # Feel free to leave defaults. They apply while these vars are commented out
 # ---
 # RESTARTPOLICY=unless-stopped
-# TIMEZONE=Etc/UTC
-TIMEZONE=<user_defined_value>
+# TZ=Etc/UTC
+TZ=<user_defined_value>
 
 # Unbound, redis, clamd, rspamd, php-fpm, SOGo, dovecot, Postfix, Nginx, acme, netfilter, watchdog, dockerapi
 IPV4_NETWORK=<user_defined_value>