How to deserialize "2015-02-02" to DateTimeOffset as UTC?

Question

Is it possible to tell Json.NET to deserialize '2012-07-19' to a DateTimeOffset value with zero offset?

Code example to reproduce:

public class SingleDateTimeField
{
    public DateTimeOffset StartDateTime { get; set; }
}

[Test]
public void Convert()
{
    // Given
    var content = @"{""startDateTime"":""2012-07-19""}";
    var jsonSerializerSettings = new JsonSerializerSettings()
    {
        DateFormatHandling = DateFormatHandling.IsoDateFormat,
        DateParseHandling = DateParseHandling.DateTimeOffset,
        DateTimeZoneHandling = DateTimeZoneHandling.Utc
    };

    // When
    var obj = JsonConvert.DeserializeObject<SingleDateTimeField>(content, jsonSerializerSettings);

    // Then
    var expected = new DateTimeOffset(2012, 07, 19, 0, 0, 0, TimeSpan.Zero);
    Assert.That(obj.StartDateTime, Is.EqualTo(expected));

}

This fails with

Expected: 2012-07-19 00:00:00.000+00:00
But was: 2012-07-19 00:00:00.000+03:00

Note that the timezone is +03:00

Update:

I can get it working by using specialized converter (example below), but isnt the setting DateTimeZoneHandling = DateTimeZoneHandling.Utc supposed to already convert this UTC? AssumeUtc converter should not be required.

public class AssumeUtc : IsoDateTimeConverter
{
    public AssumeUtc()
    {
        DateTimeStyles = System.Globalization.DateTimeStyles.AssumeUniversal;
    }
}

public class SingleDateTimeField
{
    [JsonConverter(typeof(AssumeUtc))]
    public DateTimeOffset StartDateTime { get; set; }
}