diff --git a/includes/activitypub/transformer/class-event.php b/includes/activitypub/transformer/class-event.php
index f7b5b29..9c3f49c 100644
--- a/includes/activitypub/transformer/class-event.php
+++ b/includes/activitypub/transformer/class-event.php
@@ -173,7 +173,10 @@ abstract class Event extends Post {
 		return $this->format_time( $this->get_end_time() );
 	}
 
-	static private function format_time( $time ) {
+	/**
+	 * Compose a human readable formatted time from the parameter $time.
+	 */
+	private static function format_time( $time ) {
 		if ( is_null( $time ) ) {
 			return '';
 		}
@@ -226,9 +229,9 @@ abstract class Event extends Post {
 	 * @return string $summary The custom event summary.
 	 */
 	public function get_summary(): ?string {
-		// this will result in race conditions and is imho a bad idea
-		// - either use the (userdefined) template of the activitypub plugin as it is
-		// - or implement our own templating (based on the activitypub plugin templates / by reusing their code heavily)
+		// this will result in race conditions and is imho a bad idea.
+		// - either use the (userdefined) template of the activitypub plugin as it is.
+		// - or implement our own templating (based on the activitypub plugin templates / by reusing their code heavily).
 		add_filter( 'activitypub_object_content_template', array( self::class, 'remove_ap_permalink_from_template' ), 2 );
 		$excerpt = $this->extract_excerpt();
 		// BeforeFirstRelease: decide whether this should be a admin setting.
@@ -315,7 +318,7 @@ abstract class Event extends Post {
 		$activitypub_object->set_to(
 			array(
 				'https://www.w3.org/ns/activitystreams#Public',
-				$this->get_actor_object()->get_followers(), // this fails on my machine
+				$this->get_actor_object()->get_followers(), // this fails on my machine.
 			)
 		);
 
diff --git a/includes/activitypub/transformer/class-vs-event-list.php b/includes/activitypub/transformer/class-vs-event-list.php
index 95556b8..fafb750 100644
--- a/includes/activitypub/transformer/class-vs-event-list.php
+++ b/includes/activitypub/transformer/class-vs-event-list.php
@@ -114,7 +114,7 @@ final class VS_Event_List extends Event_Transformer {
 		if ( get_post_meta( $this->wp_object->ID, 'event-summary', true ) ) {
 			return get_post_meta( $this->wp_object->ID, 'event-summary', true );
 		} else {
-			return parent::extract_excerpt(); // todo naming not uniform
+			return parent::extract_excerpt(); // todo naming not uniform.
 		}
 	}
 }