Issue #3087235 by owenbush, Snehal Brahmbhatt, the_glitch, MrPaulDriver,...

Issue #3087235 by owenbush, Snehal Brahmbhatt, the_glitch, MrPaulDriver, pjudge: Order Events by date on events series page?

src/Plugin/Field/FieldFormatter/EventInstanceDateFormatter.php

@@ -155,6 +155,15 @@ class EventInstanceDateFormatter extends EntityReferenceFormatterBase {
       $elements[$delta]['#cache']['tags'] = $entity->getCacheTags();
     }
 
+    usort($elements, function($a, $b) {
+      $a_date = $a['#options']['entity']->date->start_date->getTimestamp();
+      $b_date = $b['#options']['entity']->date->start_date->getTimestamp();
+      if ($a_date == $b_date) {
+        return 0;
+      }
+      return ($a_date < $b_date) ? -1 : 1;
+    });
+
     return $elements;
   }