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
@@ -341,10 +341,10 @@
       $recurrence_frequency_select = id(new AphrontFormSelectControl())
         ->setName('frequency')
         ->setOptions(array(
-            'daily' => pht('Daily'),
-            'weekly' => pht('Weekly'),
-            'monthly' => pht('Monthly'),
-            'yearly' => pht('Yearly'),
+            PhabricatorCalendarEvent::FREQUENCY_DAILY => pht('Daily'),
+            PhabricatorCalendarEvent::FREQUENCY_WEEKLY => pht('Weekly'),
+            PhabricatorCalendarEvent::FREQUENCY_MONTHLY => pht('Monthly'),
+            PhabricatorCalendarEvent::FREQUENCY_YEARLY => pht('Yearly'),
           ))
         ->setValue($frequency)
         ->setLabel(pht('Recurring Event Frequency'))
diff --git a/src/applications/calendar/storage/PhabricatorCalendarEvent.php b/src/applications/calendar/storage/PhabricatorCalendarEvent.php
--- a/src/applications/calendar/storage/PhabricatorCalendarEvent.php
+++ b/src/applications/calendar/storage/PhabricatorCalendarEvent.php
@@ -37,6 +37,12 @@
   private $invitees = self::ATTACHABLE;
   private $appliedViewer;
 
+  // Frequency Constants
+  const FREQUENCY_DAILY = 'daily';
+  const FREQUENCY_WEEKLY = 'weekly';
+  const FREQUENCY_MONTHLY = 'monthly';
+  const FREQUENCY_YEARLY = 'yearly';
+
   public static function initializeNewCalendarEvent(
     PhabricatorUser $actor,
     $mode) {
diff --git a/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php b/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php
--- a/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php
+++ b/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php
@@ -254,11 +254,37 @@
         }
         return $text;
       case self::TYPE_RECURRING:
+        $text = pht('%s made this event recurring.',
+          $this->renderHandleLink($author_phid));
+        return $text;
       case self::TYPE_FREQUENCY:
+        $text = '';
+        switch ($new['rule']) {
+          case PhabricatorCalendarEvent::FREQUENCY_DAILY:
+            $text = pht('%s set this event to repeat daily.',
+              $this->renderHandleLink($author_phid));
+            break;
+          case PhabricatorCalendarEvent::FREQUENCY_WEEKLY:
+            $text = pht('%s set this event to repeat weekly.',
+              $this->renderHandleLink($author_phid));
+            break;
+          case PhabricatorCalendarEvent::FREQUENCY_MONTHLY:
+            $text = pht('%s set this event to repeat monthly.',
+              $this->renderHandleLink($author_phid));
+            break;
+          case PhabricatorCalendarEvent::FREQUENCY_YEARLY:
+            $text = pht('%s set this event to repeat yearly.',
+              $this->renderHandleLink($author_phid));
+            break;
+        }
+        return $text;
       case self::TYPE_RECURRENCE_END_DATE:
+        $text = pht('%s has changed the recurrence end date of this event.',
+          $this->renderHandleLink($author_phid));
+        return $text;
       case self::TYPE_INSTANCE_OF_EVENT:
       case self::TYPE_SEQUENCE_INDEX:
-        return pht('Recurring event has been updated');
+        return pht('Recurring event has been updated.');
     }
     return parent::getTitle();
   }
@@ -438,11 +464,44 @@
         }
         return $text;
       case self::TYPE_RECURRING:
+        $text = pht('%s made %s a recurring event.',
+          $this->renderHandleLink($author_phid),
+          $this->renderHandleLink($object_phid));
+        return $text;
       case self::TYPE_FREQUENCY:
+        $text = '';
+        switch ($new['rule']) {
+          case PhabricatorCalendarEvent::FREQUENCY_DAILY:
+            $text = pht('%s set %s to repeat daily.',
+              $this->renderHandleLink($author_phid),
+              $this->renderHandleLink($object_phid));
+            break;
+          case PhabricatorCalendarEvent::FREQUENCY_WEEKLY:
+            $text = pht('%s set %s to repeat weekly.',
+              $this->renderHandleLink($author_phid),
+              $this->renderHandleLink($object_phid));
+            break;
+          case PhabricatorCalendarEvent::FREQUENCY_MONTHLY:
+            $text = pht('%s set %s to repeat monthly.',
+              $this->renderHandleLink($author_phid),
+              $this->renderHandleLink($object_phid));
+            break;
+          case PhabricatorCalendarEvent::FREQUENCY_YEARLY:
+            $text = pht('%s set %s to repeat yearly.',
+              $this->renderHandleLink($author_phid),
+              $this->renderHandleLink($object_phid));
+            break;
+        }
+        return $text;
       case self::TYPE_RECURRENCE_END_DATE:
+        $text = pht('%s set the recurrence end date of %s to %s.',
+          $this->renderHandleLink($author_phid),
+          $this->renderHandleLink($object_phid),
+          $new);
+        return $text;
       case self::TYPE_INSTANCE_OF_EVENT:
       case self::TYPE_SEQUENCE_INDEX:
-        return pht('Recurring event has been updated');
+        return pht('Recurring event has been updated.');
     }
 
     return parent::getTitleForFeed();