DateTimeInterface

class \Drupal\Core\TypedData\Plugin\DataType\DateTimeIso8601 implements \Drupal\Core\TypedData\Type\DateTimeInterface extends \Drupal\Core\TypedData\Plugin\DataType\StringData
class \Drupal\Core\TypedData\Plugin\DataType\Timestamp implements \Drupal\Core\TypedData\Type\DateTimeInterface extends \Drupal\Core\TypedData\Plugin\DataType\IntegerData

Buggy or inaccurate documentation? Please file an issue. Need support? Need help programming? Connect with the Drupal community.