diff --git a/src/applications/calendar/controller/PhabricatorCalendarEventEditController.php b/src/applications/calendar/controller/PhabricatorCalendarEventEditController.php
--- a/src/applications/calendar/controller/PhabricatorCalendarEventEditController.php
+++ b/src/applications/calendar/controller/PhabricatorCalendarEventEditController.php
@@ -437,10 +437,11 @@
         ->setValue($end_disabled);
     }
 
-    $description = id(new AphrontFormTextAreaControl())
+    $description = id(new PhabricatorRemarkupControl())
       ->setLabel(pht('Description'))
       ->setName('description')
-      ->setValue($description);
+      ->setValue($description)
+      ->setUser($viewer);
 
     $view_policies = id(new AphrontFormPolicyControl())
       ->setUser($viewer)
diff --git a/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php b/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php
--- a/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php
+++ b/src/applications/calendar/controller/PhabricatorCalendarEventViewController.php
@@ -362,10 +362,19 @@
       pht('Icon'),
       $icon_display);
 
-    $properties->addSectionHeader(
-      pht('Description'),
-      PHUIPropertyListView::ICON_SUMMARY);
-    $properties->addTextContent($event->getDescription());
+    $description = PhabricatorMarkupEngine::renderOneObject(
+      id(new PhabricatorMarkupOneOff())->setContent($event->getDescription()),
+      'default',
+      $viewer);
+
+    if (strlen($event->getDescription())) {
+
+      $properties->addSectionHeader(
+        pht('Description'),
+        PHUIPropertyListView::ICON_SUMMARY);
+
+      $properties->addTextContent($description);
+    }
 
     return $properties;
   }