Breaking: #77919 - Changed DateTime::ISO8601 to DateTime::ATOM
See forge#77919
Description
The format Date
is not compatible with ISO-8601, but is left this way for
backward compatibility reasons. The constant Date
or DATE_
is used
instead when rendering JsonViews via Extbase.
See https://php.net/manual/en/class.datetime.php#datetime.constants.iso8601 for more information