Steps to reproduce the issue

Create a calendar field in any component's XML file with the following details
<field name="nextdate" class="inputbox" format="%a %e %b %Y" timeformat="24" filter="server_utc" translateformat="false" showtime="false" singleheader="false" todaybutton="false" weeknumbers="false" filltable="false" type="calendar" label="Next Date" description=" Enter the next date" hint=" you can select the next date in the format "/>

Expected result

The selected date should get saved in the database in the respected table.

Actual result

Saved Successfully message gets displayed not an error but the date is not getting saved in the database.

System information (as much as possible)

The issue is present in both Joomla3 and Joomla4

Additional comments

You can also try adding this field in the core Joomla contact component for cross-checking it does not work there also