gistfile1.cs

public class HomePageViewModel
{
    [Display(Order=0, Name="Full Name")]
    [Required(ErrorMessage="Full Name is Required")]
    public string Name { get; set; }

    [Display(Order=1, Name="Birthday") ]
    [DateComparer(MaxDateAddDaysFromNow=0, MinDateSelector="PropertyDate")] 
    //Must be less than Now and Greater than the sibling property PropertyDate
    public DateTime BirthDate { get; set; }

    [HiddenInput(DisplayValue=false)]
    public string PropertyDate {
        get { return new DateTime(2013, 1, 1).ToString("G"); }
    }
}