Validate DateTime with FluentValidator

Question

This is my ViewModel class:

public class CreatePersonModel
{
    public string Name { get; set; }
    public DateTime DateBirth { get; set;          


        

Answer 1

public CreatePersonValidator()
{
    RuleFor(courseOffering => courseOffering.StartDate)
       .Must(BeAValidDate).WithMessage("Start date is required");

    //....
}

private bool BeAValidDate(DateTime date)
{
    return !date.Equals(default(DateTime));
}