https://www.php.net/manual/es/intlcalendar.setdatetime.php
PHP: IntlCalendar::setDateTime - Manual
Establece un campo de fecha y hora
phpmanual
https://api.drupal.org/api/drupal/core%21lib%21Drupal%21Core%21TypedData%21Type%21DateTimeInterface.php/function/DateTimeInterface%3A%3AsetDateTime/9
function DateTimeInterface::setDateTime | Drupal API
functiondrupalapi