diff --git a/core/modules/datetime/config/schema/datetime.schema.yml b/core/modules/datetime/config/schema/datetime.schema.yml
index 1471d59..4074ff2 100644
--- a/core/modules/datetime/config/schema/datetime.schema.yml
+++ b/core/modules/datetime/config/schema/datetime.schema.yml
@@ -23,4 +23,8 @@ field.datetime.value:
   type: sequence
   label: 'Default value'
   sequence:
-    - type: string
+    - type: sequence
+      label: 'Default value'
+      sequence:
+        - type: string
+          label: 'Value'