diff --git a/output/schema/schema.json b/output/schema/schema.json
index b860c96844..da9a5c1924 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -52712,7 +52712,7 @@
         },
         {
           "aliases": [
-            "1Y"
+            "1y"
           ],
           "name": "year"
         }
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index 3fb54de751..d77fffd190 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -3104,7 +3104,7 @@ export type AggregationsBuckets<TBucket = unknown> = Record<string, TBucket> | T
 
 export type AggregationsBucketsPath = string | string[] | Record<string, string>
 
-export type AggregationsCalendarInterval = 'second' | '1s' | 'minute' | '1m' | 'hour' | '1h' | 'day' | '1d' | 'week' | '1w' | 'month' | '1M' | 'quarter' | '1q' | 'year' | '1Y'
+export type AggregationsCalendarInterval = 'second' | '1s' | 'minute' | '1m' | 'hour' | '1h' | 'day' | '1d' | 'week' | '1w' | 'month' | '1M' | 'quarter' | '1q' | 'year' | '1y'
 
 export interface AggregationsCardinalityAggregate extends AggregationsAggregateBase {
   value: long
diff --git a/specification/_types/aggregations/bucket.ts b/specification/_types/aggregations/bucket.ts
index 0445f5e144..120a2099bf 100644
--- a/specification/_types/aggregations/bucket.ts
+++ b/specification/_types/aggregations/bucket.ts
@@ -263,7 +263,7 @@ export enum CalendarInterval {
   month,
   /** @aliases 1q */
   quarter,
-  /** @aliases 1Y */
+  /** @aliases 1y */
   year
 }