```php
(new \CuyZ\Valinor\MapperBuilder())
// Both `Cookie` and `ATOM` formats will be accepted
->supportDateFormats(DATE_COOKIE, DATE_ATOM)
->mapper()
->map(DateTimeInterface::class, 'Monday, 08-Nov-1971 13:37:42 UTC');
```
A new constructor can be registered to declare which format(s) are
supported during the mapping of a date object. By default, any valid
timestamp or ATOM-formatted value will be accepted.
```php
(new \CuyZ\Valinor\MapperBuilder())
// Both COOKIE and ATOM formats will be accepted
->registerConstructor(
new \CuyZ\Valinor\Mapper\Object\DateTimeFormatConstructor(DATE_COOKIE, DATE_ATOM)
)
->mapper()
->map(DateTimeInterface::class, 'Monday, 08-Nov-1971 13:37:42 UTC');
```
The previously very opinionated behaviour has been removed, but can be
temporarily used to help with the migration.
```php
(new \CuyZ\Valinor\MapperBuilder())
->registerConstructor(
new \CuyZ\Valinor\Mapper\Object\BackwardCompatibilityDateTimeConstructor()
)
->mapper()
->map(DateTimeInterface::class, 'Monday, 08-Nov-1971 13:37:42 UTC');
```
