Donnot show date time value in field system config BE Magento 2

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:module:Magento_Config:etc/system_file.xsd">
    <system>
        <tab id="mycustom" translate="label" sortOrder="450">
            <label>My Custom Setting</label>
        </tab>
        <section id="mycustom" translate="label" type="text" sortOrder="100" showInDefault="1" showInWebsite="1" showInStore="1">
            <class>separator-top</class>
            <label>My Custom Setting</label>
            <tab>mycustom</tab>
            <resource>Magento_Checkout::config</resource>
            <group id="general" translate="label" type="text" sortOrder="10" showInDefault="1" showInWebsite="1" showInStore="1">
                <field id="mydate" translate="label" type="date" showInDefault="1" showInWebsite="1" showInStore="1">
                    <label>My Date Field</label>
                    <frontend_model>VendorCheckoutBlockAdminhtmlSystemConfigDate</frontend_model>
                </field>
            </group>
        </section>
    </system>
</config>

How to fix it?