title: Validate DateTime with DataAnnotation
body: <p>I'm developing and asp.net app and i'm using data annotations to validate my Input model. In this model, I have one field of type DateTime, and I'd like to know how could I customize the message when the user set an date value invalid.</p>
  
  <p>My property in my model:</p>
  
  <pre><code>[Required(ErrorMessage = "Informe sua data de nascimento.")]
  [MinAge(Idade = 18, ErrorMessage = "Você deve possuir no mínimo 18 anos para se cadastrar neste website.")]
  public virtual DateTime DataNascimento { get; set; }
  </code></pre>
  
  <p>My model is thowing a message like this: "The value '45/64/5646' is not valid for DataNascimento."</p>
  
  <p>If you could help me I appretiate!</p>
  
  <p>PS: The messages of validators are in pt-br (because it'll be the language of the application)</p>
  
  <p>Thanks a lot</p>