diff --git a/src/Controller/SystemConfigurationController.php b/src/Controller/SystemConfigurationController.php
index 501e85cf..be61038c 100644
--- a/src/Controller/SystemConfigurationController.php
+++ b/src/Controller/SystemConfigurationController.php
@@ -34,6 +34,7 @@ use Symfony\Component\Routing\Annotation\Route;
 use Symfony\Component\Validator\Constraints\DateTime;
 use Symfony\Component\Validator\Constraints\GreaterThanOrEqual;
 use Symfony\Component\Validator\Constraints\NotNull;
+use Symfony\Component\Validator\Constraints\Regex;
 
 /**
  * Controller used for executing system relevant tasks.
@@ -346,6 +347,11 @@ class SystemConfigurationController extends AbstractController
                         ->setTranslationDomain('system-configuration')
                         ->setType(TextType::class)
                         ->setConstraints([new DateTime(['format' => 'H:i']), new NotNull()]),
+                    (new Configuration())
+                        ->setName('calendar.slot_duration')
+                        ->setTranslationDomain('system-configuration')
+                        ->setType(TextType::class)
+                        ->setConstraints([new Regex(['pattern' => '/[0-2]{1}[0-9]{1}:[0-9]{2}:[0-9]{2}/']), new NotNull()]),
                 ]),
             (new SystemConfigurationModel())
                 ->setSection(SystemConfigurationModel::SECTION_BRANDING)
diff --git a/translations/system-configuration.de.xliff b/translations/system-configuration.de.xliff
index 298d61f7..c1ca15d2 100644
--- a/translations/system-configuration.de.xliff
+++ b/translations/system-configuration.de.xliff
@@ -98,6 +98,10 @@
                 <source>label.calendar.visibleHours.end</source>
                 <target>Ende des sichtbaren Zeitbereichs</target>
             </trans-unit>
+            <trans-unit id="label.calendar.slot_duration">
+                <source>label.calendar.slot_duration</source>
+                <target>Slotdauer für Wochen- und Tagesansicht (Format: hh:mm:ss)</target>
+            </trans-unit>
             <trans-unit id="branding">
                 <source>branding</source>
                 <target>Markendarstellung</target>
diff --git a/translations/system-configuration.en.xliff b/translations/system-configuration.en.xliff
index e08916e4..e90bfc33 100644
--- a/translations/system-configuration.en.xliff
+++ b/translations/system-configuration.en.xliff
@@ -98,6 +98,10 @@
                 <source>label.calendar.visibleHours.end</source>
                 <target>End of visible time range</target>
             </trans-unit>
+            <trans-unit id="label.calendar.slot_duration">
+                <source>label.calendar.slot_duration</source>
+                <target>Slot duration for week- and day view (format: hh:mm:ss)</target>
+            </trans-unit>
             <trans-unit id="branding">
                 <source>branding</source>
                 <target>Branding</target>