Based on datetime_immutable.

After DatePointType and DatePointDateType, it would be great to use Forms without needing to transform values into the DatePoint type manually.

use Symfony\Component\Form\Extension\Core\Type\DateType;

$builder->add('from', DateType::class, [
    'input' => 'date_point',
]);

Alternative: Make symfony/clock a hard requirement and refactor the existing DateTimeImmutableToDateTimeTransformer to return a DatePoint instead. This should not introduce any breaking changes.