diff --git a/src/plugins/console/server/lib/spec_definitions/js/mappings.ts b/src/plugins/console/server/lib/spec_definitions/js/mappings.ts
index aa09278d075538..e6b3d4d5fcb6ef 100644
--- a/src/plugins/console/server/lib/spec_definitions/js/mappings.ts
+++ b/src/plugins/console/server/lib/spec_definitions/js/mappings.ts
@@ -157,58 +157,65 @@ export const mappings = (specService: SpecDefinitionsService) => {
 
           // dates
           format: {
+            // outer array required to for an array of string values
             __one_of: [
-              ...[
-                'date',
-                'date_time',
-                'date_time_no_millis',
-                'ordinal_date',
-                'ordinal_date_time',
-                'ordinal_date_time_no_millis',
-                'time',
-                'time_no_millis',
-                't_time',
-                't_time_no_millis',
-                'week_date',
-                'week_date_time',
-                'week_date_time_no_millis',
-              ].map(function (s) {
-                return ['basic_' + s, 'strict_' + s];
-              }),
-              ...[
-                'date',
-                'date_hour',
-                'date_hour_minute',
-                'date_hour_minute_second',
-                'date_hour_minute_second_fraction',
-                'date_hour_minute_second_millis',
-                'date_optional_time',
-                'date_time',
-                'date_time_no_millis',
-                'hour',
-                'hour_minute',
-                'hour_minute_second',
-                'hour_minute_second_fraction',
-                'hour_minute_second_millis',
-                'ordinal_date',
-                'ordinal_date_time',
-                'ordinal_date_time_no_millis',
-                'time',
-                'time_no_millis',
-                't_time',
-                't_time_no_millis',
-                'week_date',
-                'week_date_time',
-                'weekDateTimeNoMillis',
-                'week_year',
-                'weekyearWeek',
-                'weekyearWeekDay',
-                'year',
-                'year_month',
-                'year_month_day',
-                'epoch_millis',
-                'epoch_second',
-              ],
+              [
+                ...[
+                  'date',
+                  'date_time',
+                  'date_time_no_millis',
+                  'ordinal_date',
+                  'ordinal_date_time',
+                  'ordinal_date_time_no_millis',
+                  'time',
+                  'time_no_millis',
+                  't_time',
+                  't_time_no_millis',
+                  'week_date',
+                  'week_date_time',
+                  'week_date_time_no_millis',
+                ].flatMap(function (s) {
+                  return ['basic_' + s, 'strict_' + s];
+                }),
+                ...[
+                  'date',
+                  'date_hour',
+                  'date_hour_minute',
+                  'date_hour_minute_second',
+                  'date_hour_minute_second_fraction',
+                  'date_hour_minute_second_millis',
+                  'date_optional_time',
+                  'date_time',
+                  'date_time_no_millis',
+                  'hour',
+                  'hour_minute',
+                  'hour_minute_second',
+                  'hour_minute_second_fraction',
+                  'hour_minute_second_millis',
+                  'ordinal_date',
+                  'ordinal_date_time',
+                  'ordinal_date_time_no_millis',
+                  'time',
+                  'time_no_millis',
+                  't_time',
+                  't_time_no_millis',
+                  'week_date',
+                  'week_date_time',
+                  'weekDateTimeNoMillis',
+                  'weekyear',
+                  'strict_weekyear',
+                  'weekyear_week',
+                  'strict_weekyear_week',
+                  'strict_date_optional_time_nanos',
+                  'weekyear_week_day',
+                  'strict_weekyear_week_day',
+                  'year',
+                  'year_month',
+                  'year_month_day',
+                  'epoch_millis',
+                  'epoch_second',
+                ],
+              ].sort(),
             ],
           },