diff --git a/src/Nest/Resolvers/Writers/WritePropertiesFromAttributeVisitor.cs b/src/Nest/Resolvers/Writers/WritePropertiesFromAttributeVisitor.cs
index c5d805ac182..1d4952f0095 100644
--- a/src/Nest/Resolvers/Writers/WritePropertiesFromAttributeVisitor.cs
+++ b/src/Nest/Resolvers/Writers/WritePropertiesFromAttributeVisitor.cs
@@ -68,6 +68,11 @@ public void VisitBaseAttribute(IElasticPropertyAttribute att) {
                 this._jsonWriter.WritePropertyName("search_analyzer");
                 this._jsonWriter.WriteValue(att.SearchAnalyzer);
             }
+            if (!att.DateFormat.IsNullOrEmpty())
+            {
+                this._jsonWriter.WritePropertyName("format");
+                this._jsonWriter.WriteValue(att.DateFormat);
+            }
             if (att.Index != FieldIndexOption.analyzed)
             {
                 this._jsonWriter.WritePropertyName("index");