DateTime is passed

[tijsverkoyen]

The format from the options, is the one Symfony needs. This is not compatible with DateTime::createfromformat.
In our old docs there is also an example where we pass a DateTime object as min and max date

[tijsverkoyen]

My code:

        $builder
            ->add(
                'start',
                DateType::class,
                [
                    'data' => new \DateTimeImmutable(),
                    'widget' => 'single_text',
                    'minimum_date' => (new \DateTimeImmutable())->format('d/m/Y'),
                    'maximum_date' => (new \DateTimeImmutable())->format('d/m/Y'),
                ]
            );

If I don't use it correctly, and this PR is just stupid because of my limited knowledge, can you give me a working example?