diff --git a/dev-test/backends/azure/config.yml b/dev-test/backends/azure/config.yml
index 1fed4943d378..84f2c5faa972 100644
--- a/dev-test/backends/azure/config.yml
+++ b/dev-test/backends/azure/config.yml
@@ -30,6 +30,7 @@ collections:
       - label: Publish Date
         name: date
         widget: datetime
+        format: 'YYYY-MM-DDTHH:mm'
       - label: Description
         name: description
         widget: text
diff --git a/dev-test/backends/bitbucket/config.yml b/dev-test/backends/bitbucket/config.yml
index b7ad4d5c13eb..f3a5d24a1e2c 100644
--- a/dev-test/backends/bitbucket/config.yml
+++ b/dev-test/backends/bitbucket/config.yml
@@ -28,6 +28,7 @@ collections:
       - label: Publish Date
         name: date
         widget: datetime
+        format: 'YYYY-MM-DDTHH:mm'
       - label: Description
         name: description
         widget: text
diff --git a/dev-test/backends/git-gateway/config.yml b/dev-test/backends/git-gateway/config.yml
index d6c689c80fac..b0a27e01b263 100644
--- a/dev-test/backends/git-gateway/config.yml
+++ b/dev-test/backends/git-gateway/config.yml
@@ -27,6 +27,7 @@ collections:
       - label: Publish Date
         name: date
         widget: datetime
+        format: 'YYYY-MM-DDTHH:mm'
       - label: Description
         name: description
         widget: text
diff --git a/dev-test/backends/gitea/config.yml b/dev-test/backends/gitea/config.yml
index 483c154e15bb..1552ad473292 100644
--- a/dev-test/backends/gitea/config.yml
+++ b/dev-test/backends/gitea/config.yml
@@ -28,6 +28,7 @@ collections:
       - label: Publish Date
         name: date
         widget: datetime
+        format: 'YYYY-MM-DDTHH:mm'
       - label: Description
         name: description
         widget: text
diff --git a/dev-test/backends/github/config.yml b/dev-test/backends/github/config.yml
index bf5ff5a10166..0f024c067bd6 100644
--- a/dev-test/backends/github/config.yml
+++ b/dev-test/backends/github/config.yml
@@ -28,6 +28,7 @@ collections:
       - label: Publish Date
         name: date
         widget: datetime
+        format: 'YYYY-MM-DDTHH:mm'
       - label: Description
         name: description
         widget: text
diff --git a/dev-test/backends/gitlab/config.yml b/dev-test/backends/gitlab/config.yml
index d7650a96c206..0b3836a1d8f5 100644
--- a/dev-test/backends/gitlab/config.yml
+++ b/dev-test/backends/gitlab/config.yml
@@ -28,6 +28,7 @@ collections:
       - label: Publish Date
         name: date
         widget: datetime
+        format: 'YYYY-MM-DDTHH:mm'
       - label: Description
         name: description
         widget: text
diff --git a/dev-test/backends/proxy/config.yml b/dev-test/backends/proxy/config.yml
index d5647311a18d..c8cbc9b92b9e 100644
--- a/dev-test/backends/proxy/config.yml
+++ b/dev-test/backends/proxy/config.yml
@@ -32,6 +32,7 @@ collections:
       - label: Publish Date
         name: date
         widget: datetime
+        format: 'YYYY-MM-DDTHH:mm'
       - label: Description
         name: description
         widget: text
diff --git a/packages/decap-cms-widget-datetime/src/DateTimeControl.js b/packages/decap-cms-widget-datetime/src/DateTimeControl.js
index 78659bb4af78..42d456bc38bc 100644
--- a/packages/decap-cms-widget-datetime/src/DateTimeControl.js
+++ b/packages/decap-cms-widget-datetime/src/DateTimeControl.js
@@ -64,7 +64,7 @@ class DateTimeControl extends React.Component {
 
   getFormat() {
     const { field } = this.props;
-    const format = field?.get('format') || 'YYYY-MM-DDTHH:mm';
+    const format = field?.get('format') || 'YYYY-MM-DDTHH:mm:ss.SSS[Z]';
     const dateFormat = field?.get('date_format');
     const timeFormat = field?.get('time_format');
     let inputFormat = 'YYYY-MM-DDTHH:mm';