diff --git a/app/controllers/events_controller.rb b/app/controllers/events_controller.rb
index 9a9f5767a..d3832be7d 100644
--- a/app/controllers/events_controller.rb
+++ b/app/controllers/events_controller.rb
@@ -181,6 +181,10 @@ def index
         if total.positive?
           facet_by_source(response.response.aggregations.sources.buckets)
         end
+      occurred =
+        if total.positive?
+          facet_by_source(response.response.aggregations.occurred.buckets)
+        end
       prefixes =
         if total.positive?
           facet_by_source(response.response.aggregations.prefixes.buckets)
@@ -214,6 +218,7 @@ def index
         page:
           page[:cursor].nil? && page[:number].present? ? page[:number] : nil,
         sources: sources,
+        occurred: occurred,
         prefixes: prefixes,
         "citationTypes" => citation_types,
         "relationTypes" => relation_types,
diff --git a/app/models/event.rb b/app/models/event.rb
index 5fc8fbe38..30da52ccd 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -253,6 +253,8 @@ def self.query_aggregations
     {
       sources: { terms: { field: "source_id", size: 10, min_doc_count: 1 } },
       prefixes: { terms: { field: "prefix", size: 10, min_doc_count: 1 } },
+      occurred: { date_histogram: { field: "occurred_at", interval: "year", format: "year", order: { _key: "desc" }, min_doc_count: 1 },
+      aggs: { bucket_truncate: { bucket_sort: { size: 10 } } } },
       registrants: {
         terms: { field: "registrant_id", size: 10, min_doc_count: 1 },
         aggs: {