Added ISO formatted strings being allowed as date inputs

src/collective/volto/formsupport/restapi/services/submit_form/post.py

@@ -469,7 +469,7 @@ def prepare_message(self):
             request=self.request,
         )
         parameters = {
-            "parameters": self.filter_parameters(),
+            "parameters": self.format_fields(self.filter_parameters()),
             "url": self.context.absolute_url(),
             "title": self.context.Title(),
             "mail_header": mail_header,
@@ -493,6 +493,18 @@ def filter_parameters(self):
 
         return result
 
+    def format_fields(self, fields):
+        formatted_fields = []
+        field_ids = [field.get("field_id") for field in self.block.get("subblocks", [])]
+        for field in fields:
+            field_id = field.get("field_id", "")
+            if field_id:
+                field_index = field_ids.index(field_id)
+                if self.block["subblocks"][field_index].get("field_type") == "date":
+                    field["value"] = api.portal.get_localized_time(field["value"])
+            formatted_fields.append(field)
+        return formatted_fields
+
     def send_mail(self, msg, charset):
         host = api.portal.get_tool(name="MailHost")
         # we set immediate=True because we need to catch exceptions.

src/collective/volto/formsupport/tests/test_send_action_form.py

@@ -1074,6 +1074,61 @@ def test_email_body_formated_as_list(
         self.assertIn("<strong>Message:</strong> just want to say hi", msg)
         self.assertIn("<strong>Name:</strong> John", msg)
 
+    def test_send_date(
+        self,
+    ):
+        self.document.blocks = {
+            "form-id": {
+                "@type": "form",
+                "send": True,
+                "email_format": "list",
+                "subblocks": [
+                    {
+                        "field_id": "date_field_simple",
+                        "field_type": "date",
+                    },
+                    {
+                        "field_id": "date_field_iso",
+                        "field_type": "date",
+                    },
+                ],
+            },
+        }
+        transaction.commit()
+
+        response = self.submit_form(
+            data={
+                "from": "[email protected]",
+                "data": [
+                    {
+                        "field_id": "date_field_simple",
+                        "label": "Simple date",
+                        "value": "2024-09-16",
+                    },
+                    {
+                        "field_id": "date_field_iso",
+                        "label": "ISO date",
+                        "value": "2024-09-16T16:20:00Z",
+                    },
+                ],
+                "subject": "test subject",
+                "block_id": "form-id",
+            },
+        )
+        transaction.commit()
+        self.assertEqual(response.status_code, 200)
+        msg = self.mailhost.messages[0]
+        if isinstance(msg, bytes) and bytes is not str:
+            # Python 3 with Products.MailHost 4.10+
+            msg = msg.decode("utf-8")
+        msg = re.sub(r"\s+", " ", msg)
+        self.assertIn("Subject: test subject", msg)
+        self.assertIn("From: [email protected]", msg)
+        self.assertIn("To: [email protected]", msg)
+        self.assertIn("Reply-To: [email protected]", msg)
+        self.assertIn("<strong>Simple date:</strong> Sep 16, 2024", msg)
+        self.assertIn("<strong>ISO date:</strong> Sep 16, 2024", msg)
+
     def test_send_xml(self):
         self.document.blocks = {
             "form-id": {