Steps to reproduce the issue

Add this line

In a override of the front-end edit like
template\html\com_content\form\edit.php

Expected result

Possible to edit and save the created date of a article in the front-end editor

Actual result

Date is loaded but not saved

My fix:

In site\components\com_content\models\article.xml

Add the following lines to the field created in the article.xml
filter="user_utc"
showtime="false"

I have changed the field created:
< field
name="created"
type="calendar"
label="Aanmaakdatum"
translateformat="true"
id="created"
filter="user_utc"
showtime="false"
/ >

System information (as much as possible)

Joomla version 3.8.11

Additional comments

It is possible to load the created date of a article but if you edit and save Joomla will not save it. This is caused by the filter of Joomla which will clear the value after submitting the changes.