Date format not respected in date ui component

[ioweb-gr]

Preconditions and environment

• 2.4.6-p5

Steps to reproduce

I've created a ui component form

<form xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Ui:etc/ui_configuration.xsd">
    <argument name="data" xsi:type="array">
        <item name="js_config" xsi:type="array">
            <item name="provider" xsi:type="string">sync_documents_form.sync_documents_form_data_source</item>
        </item>
        <item name="label" xsi:type="string" translate="true">Sync Documents</item>
        <item name="template" xsi:type="string">templates/form/collapsible</item>
    </argument>
    <settings>
        <buttons>
            <button name="save" class="Mv\CliDocumentImporter\Block\Adminhtml\SyncDocuments\Button\Submit"/>
        </buttons>
        <namespace>sync_documents_form</namespace>
        <dataScope>data.general</dataScope>
        <deps>
            <dep>sync_documents_form.sync_documents_form_data_source</dep>
        </deps>
    </settings>
    <dataSource name="sync_documents_form_data_source" component="Magento_Ui/js/form/provider">
        <settings>
            <submitUrl path="clidocumentimporter/customer/syncsubmit"/>
        </settings>
        <dataProvider class="Mv\CliDocumentImporter\Ui\DataProvider\SyncDocuments" name="sync_documents_form_data_source">
            <settings>
                <requestFieldName>id</requestFieldName>
                <primaryFieldName>id</primaryFieldName>
            </settings>
        </dataProvider>
    </dataSource>
    <fieldset name="general">
        <settings>
            <label translate="true">General</label>
        </settings>
        <field name="id" formElement="hidden">
            <settings>
                <dataType>text</dataType>
                <dataScope>id</dataScope>
            </settings>
        </field>
        <field name="customer_ids" formElement="hidden">
            <settings>
                <dataType>text</dataType>
                <label translate="true">Customers</label>
                <dataScope>customer_ids</dataScope>
            </settings>
        </field>
        <field name="date_from" formElement="date">
            <argument name="data" xsi:type="array">
                <item name="config" xsi:type="array">
                    <item name="options" xsi:type="array">
                        <item name="showsTime" xsi:type="boolean">false</item>
                        <item name="inputDateFormat" xsi:type="string">y-MM-dd</item>
                        <item name="outputDateFormat" xsi:type="string">y-MM-dd</item>
                        <item name="pickerDateTimeFormat" xsi:type="string">y-MM-dd</item>
                    </item>
                </item>
            </argument>
            <settings>
                <dataType>timestamp</dataType>
                <label translate="true">Date From</label>
                <dataScope>date_from</dataScope>
                <validation>
                    <rule name="required-entry" xsi:type="boolean">true</rule>
                    <rule name="validate-date" xsi:type="boolean">true</rule>
                </validation>
                <notice translate="true">Enter the starting date to sync from</notice>
            </settings>
        </field>
    </fieldset>
</form>

But I notice that the date field appears with the wrong date format.

I want to force display and input value as the equivalent of php's 'Y-m-d' format.

However no matter what I put in the config options
https://developer.adobe.com/commerce/frontend-core/ui-components/components/date/

the display is like this

And the input value is passed as seen in the screenshot.

Expected result

My field renders with the appropriate date format.

Actual result

The field appears in the wrong format.

Additional information

No response

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

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[m2-assistant]

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[engcom-November]

Hello @ioweb-gr,

Thank you for the report and collaboration!

Verified this issue on 2.4-develop, and it's reproduced.
When creating a ui component of date field, the date format is not being changed as specified.

Please take a look at the screenshot:
Even though the date format is specified as y-MM-dd the default format is rendered.

Hence confirming this.

Please find the module used to reproduce this issue.
I39218V.zip

Thank you.

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/AC-13174 is successfully created for this GitHub issue.