Swashbucke Date example showing time component/wrong format

Question

We specify an input property with an example value as such

/// <summary>
/// Start date in format YYYY-MM-DD
/// </summary>
/// <example>2020-05-31</example>
[DataType(DataType.Date)]
public DateTime? From { get; set; }

And produces the following json

{
  "name": "from",
  "in": "query",
  "description": "Start date in format YYYY-MM-DD",
  "schema": {
    "type": "string",
    "description": "Start date in format YYYY-MM-DD",
    "format": "date",
    "nullable": true,
    "example": "31/05/2020 12:00:00 AM"
  }
}

it looks like the example is not respecting the swagger date format which is: full-date of format YYYY-MM-DD

The setup code I used:

public void ConfigureServices(IServiceCollection services)
{
    services.AddControllers();
    services.AddSwaggerGen(swaggerGenOption =>
    {
        swaggerGenOption.SwaggerDoc("v1", new OpenApiInfo { Title = "API", Version = "v1" });
        swaggerGenOption.IncludeXmlComments(XmlDocPath<Startup>());
    });
}

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
    app.UseRouting();
    app.UseSwagger();
    app.UseSwaggerUI(config =>
    {
        config.RoutePrefix = string.Empty
        config.SwaggerEndpoint("./swagger/v1/swagger.json", "TST");
    });
    app.UseEndpoints(endpoints => endpoints.MapControllers());
}