diff --git a/Containers/mastercontainer/start.sh b/Containers/mastercontainer/start.sh
index c0c37af25ab..e48a24cae97 100644
--- a/Containers/mastercontainer/start.sh
+++ b/Containers/mastercontainer/start.sh
@@ -304,8 +304,8 @@ E.g. https://internal.ip.of.this.server:8080
 If your server has port 80 and 8443 open and you point a domain to your server, you can get a valid certificate automatically by opening the Nextcloud AIO Interface via:
 https://your-domain-that-points-to-this-server.tld:8443"
 
-# Set the timezone to UTC
-export TZ=UTC
+# Set the timezone to Etc/UTC
+export TZ=Etc/UTC
 
 # Fix apache startup
 rm -f /var/run/apache2/httpd.pid
diff --git a/php/src/Docker/DockerActionManager.php b/php/src/Docker/DockerActionManager.php
index 913598462a2..ef2a972bac6 100644
--- a/php/src/Docker/DockerActionManager.php
+++ b/php/src/Docker/DockerActionManager.php
@@ -317,7 +317,7 @@ public function CreateContainer(Container $container) : void {
                     }
                 } elseif ($out[1] === 'TIMEZONE') {
                     if ($this->configurationManager->GetTimezone() === '') {
-                        $replacements[1] = 'UTC';
+                        $replacements[1] = 'Etc/UTC';
                     } else {
                         $replacements[1] = $this->configurationManager->GetTimezone();
                     }
diff --git a/php/templates/containers.twig b/php/templates/containers.twig
index c5f170d700a..16307c721c2 100644
--- a/php/templates/containers.twig
+++ b/php/templates/containers.twig
@@ -629,7 +629,7 @@
                                 <input type="hidden" name="{{csrf.keys.value}}" value="{{csrf.value}}">
                                 <input class="button" type="submit" value="Submit timezone" onclick="return confirm('Are you sure that this is a valid timezone? Please double check by following the wikipedia article and checking the correct column since if not, it will break the startup since the database will not get correctly initialized and you will end in a startup loop.')" />
                             </form>
-                            You need to make sure that the timezone that you enter is valid. An example is <b>Europe/Berlin</b>. You can get valid values by looking at the 'TZ database name' column of this list: <a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List"><b>click here</b></a>.<br><br>
+                            You need to make sure that the timezone that you enter is valid. An example is <b>Europe/Berlin</b>. You can get valid values by looking at the 'TZ database name' column of this list: <a href="https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List"><b>click here</b></a>. The default is <b>Etc/UTC<b> if nothing is entered.<br><br>
                         {% else %}
                             The timezone for Nextcloud is currently set to <b>{{ timezone }}</b>. You can reset the timezone again by clicking on the button below.<br><br/>
                             <form method="POST" action="/api/configuration" class="xhr">