diff --git a/src/applications/calendar/controller/PhabricatorCalendarEventCancelController.php b/src/applications/calendar/controller/PhabricatorCalendarEventCancelController.php
--- a/src/applications/calendar/controller/PhabricatorCalendarEventCancelController.php
+++ b/src/applications/calendar/controller/PhabricatorCalendarEventCancelController.php
@@ -81,14 +81,14 @@
     if ($is_cancelled) {
       if ($sequence || $is_parent_cancelled) {
         $title = pht('Cannot Reinstate Instance');
-        $paragraph = pht('Cannot reinstate an instance of a
-          cancelled recurring event.');
+        $paragraph = pht('Cannot reinstate an instance of a ' .
+          'cancelled recurring event.');
         $cancel = pht('Cancel');
         $submit = null;
       } else if ($is_parent) {
         $title = pht('Reinstate Recurrence');
-        $paragraph = pht('Reinstate the entire series
-          of recurring events?');
+        $paragraph = pht('Reinstate the entire series ' .
+          'of recurring events?');
         $cancel = pht('Don\'t Reinstate Recurrence');
         $submit = pht('Reinstate Recurrence');
       } else {
@@ -100,20 +100,20 @@
     } else {
       if ($sequence) {
         $title = pht('Cancel Instance');
-        $paragraph = pht('Cancel just this instance
-          of a recurring event.');
+        $paragraph = pht('Cancel just this instance ' .
+          'of a recurring event.');
         $cancel = pht('Don\'t Cancel Instance');
         $submit = pht('Cancel Instance');
       } else if ($is_parent) {
         $title = pht('Cancel Recurrence');
-        $paragraph = pht('Cancel the entire series
-          of recurring events?');
+        $paragraph = pht('Cancel the entire series ' .
+          'of recurring events?');
         $cancel = pht('Don\'t Cancel Recurrence');
         $submit = pht('Cancel Recurrence');
       } else {
         $title = pht('Cancel Event');
-        $paragraph = pht('You can always reinstate
-          the event later.');
+        $paragraph = pht('You can always reinstate ' .
+          'the event later.');
         $cancel = pht('Don\'t Cancel Event');
         $submit = pht('Cancel Event');
       }
diff --git a/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php b/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php
--- a/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php
+++ b/src/applications/calendar/storage/PhabricatorCalendarEventTransaction.php
@@ -238,7 +238,7 @@
           } else if ($count_added > 0 && $count_uninvited > 0) {
             $added_text = $this->renderHandleList($added);
             $uninvited_text = $this->renderHandleList($uninvited);
-            $text = pht('%s invited %s and uninvited: %s',
+            $text = pht('%s invited %s and uninvited %s.',
               $this->renderHandleLink($author_phid),
               $added_text,
               $uninvited_text);
@@ -303,7 +303,7 @@
       case self::TYPE_NAME:
         if ($old === null) {
           return pht(
-            '%s created %s',
+            '%s created %s.',
             $this->renderHandleLink($author_phid),
             $this->renderHandleLink($object_phid));
         } else {
@@ -445,7 +445,7 @@
           } else if ($count_added > 0 && $count_uninvited > 0) {
             $added_text = $this->renderHandleList($added);
             $uninvited_text = $this->renderHandleList($uninvited);
-            $text = pht('%s invited %s and uninvited %s to %s',
+            $text = pht('%s invited %s and uninvited %s to %s.',
               $this->renderHandleLink($author_phid),
               $added_text,
               $uninvited_text,