Bulk load data conversion error while importing DATETIME data - sql-server

Question

I found a few posts on this topic on StackOverflow, but none seem to solve my problem.
I am trying to set up bulk imports for SQL Server 2008 Express, and it is failing to import datetime values. The issue seems so basic that I must be missing something very simple, and I'm hoping someone else can catch the problem.
The Problem
I am importing into this table:
CREATE TABLE [dbo].[BulkTest](
[ReportDate] [datetime] NOT NULL
)
This is my format file (BulkTest.fmt):
10.0
1
1 SQLDATETIME 0 0 "\r\n" 1 ReportDate ""
This is the data being imported (BulkTest.tab):
ReportDate
2010-12-31
2011-01-31
This is the import statement:
BULK INSERT dbo.BulkTest
FROM 'Q:\...\BulkTest.tab'
WITH (
CHECK_CONSTRAINTS,
TABLOCK,
FORMATFILE='Q:\...\BulkTest.fmt',
FIRSTROW=1,
DATAFILETYPE='char'
);
These are the errors:
Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 1, column 1 (ReportDate).
Msg 4864, Level 16, State 1, Line 1
Bulk load data conversion error (type mismatch or invalid character for the specified codepage) for row 2, column 1 (ReportDate).
Msg 4832, Level 16, State 1, Line 1
I Have Tried
Changing the date format, including 12/31/2010, 31/12/2010, 20101231, 2010-12-31 00:00:00, and various other formats.
Adding/removing/changing bulk insert statement options DATAFILETYPE, TABLOCK, CHECK_CONSTRAINTS.
Changing the delimiter and the field size in the format file (though per MSDN the field size should not matter).
Running SET DATEFORMAT ymd.
Checking the imported file with hex editor to make sure that it really does contain 8-bit chars and not unicode; it contains exactly what is shown in ASCII format.
Any ideas?

Answer 1

This is the format that works in my code:
08/17/2000 16:32:32
The producer happens to be .NET, ToString(DateTimeFormatInfo.InvariantInfo).

Answer 2

Why do you need a format file for this? What happens when you don't use it?
BULK INSERT dbo.BulkTest
FROM 'Q:\...\BulkTest.tab'
WITH (
CHECK_CONSTRAINTS,
TABLOCK,
FIRSTROW=1,
DATAFILETYPE='char',
ROWTERMINATOR='\r\n'
);

Answer 3

Sorry I'm late to the party but I hope this can help some other poor soul.
Anyway I discovered the same error when using the format file.
Instead of type SQLDATE I used SQLCHAR and the length.
2015-01-01 = length 10
11.0
1
1 SQLCHAR 0 10 "\r\n" 1 my_date ""