Datetime in a model not working

Question

I have a Asp.Net web app and I have the following date defined in my model:

 

[Required]

[Display(Name = "Birth Date")]

[DataType(DataType.Date)]

[DisplayFormat(DataFormatString = "{0:MMM-dd-yyyy}", ApplyFormatInEditMode = true)]

[RegularExpression(@"(((0[1-9]|1[0-2])\/(0|1)[0-9]|2[0-9]|3[0-1])\/((19|20)\d\d))$", ErrorMessage = "Invalid date format.")]

public DateTime BirthDate { get; set; }

 

When the viewis retrieved, the birth date set to the field from the database is: 1/18/1985 12:00:00 am

 

 

  

I change it to: 01/18/1985 and submit the Form.

The controller server-side validation catches it as an error - invalid date format.

 

 

 

What am I doing wrong?