diff --git a/app/controllers/events_controller.rb b/app/controllers/events_controller.rb
index 54bf98e53..20da27e2d 100644
--- a/app/controllers/events_controller.rb
+++ b/app/controllers/events_controller.rb
@@ -183,7 +183,7 @@ def index
         end
       citation_years =
         if total.positive?
-          facet_annual(response.response.aggregations.citation_years.buckets)
+          facet_by_cumulative_year(response.response.aggregations.citation_years.buckets)
         end
       prefixes =
         if total.positive?
diff --git a/app/controllers/old_events_controller.rb b/app/controllers/old_events_controller.rb
index 8be6be5ba..712a802d2 100644
--- a/app/controllers/old_events_controller.rb
+++ b/app/controllers/old_events_controller.rb
@@ -178,7 +178,7 @@ def index
             end
           citation_years =
             if total > 0
-              facet_annual(response.aggregations.citation_years.buckets)
+              facet_by_cumulative_year(response.aggregations.citation_years.buckets)
             end
           citation_types =
             if total > 0
diff --git a/app/models/event.rb b/app/models/event.rb
index 381475411..981b226a4 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -958,17 +958,10 @@ def obj_cache_key
   end
 
   def citation_year
-    unless (INCLUDED_RELATION_TYPES + RELATIONS_RELATION_TYPES).include?(
-      relation_type_id,
-    )
-      ""
-    end
     subj_publication =
-      subj["datePublished"] || subj["date_published"] ||
-      (date_published(subj_id) || year_month)
+      subj["datePublished"] || subj["date_published"]
     obj_publication =
-      obj["datePublished"] || obj["date_published"] ||
-      (date_published(obj_id) || year_month)
+      obj["datePublished"] || obj["date_published"]
     [subj_publication[0..3].to_i, obj_publication[0..3].to_i].max
   end