Add the "publication field"in the blog and gleaning content type

config/sync/field.field.node.blog.field_publication_date.yml

@@ -0,0 +1,21 @@
+uuid: 1e193d8e-d6b0-4238-b289-59055d310d46
+langcode: en
+status: true
+dependencies:
+  config:
+    - field.storage.node.field_publication_date
+    - node.type.blog
+  module:
+    - datetime
+id: node.blog.field_publication_date
+field_name: field_publication_date
+entity_type: node
+bundle: blog
+label: 'Publication date'
+description: ''
+required: false
+translatable: true
+default_value: {  }
+default_value_callback: ''
+settings: {  }
+field_type: datetime