public void Configure(IApplicationBuilder app)
{
            var supportedCultures = new[]
            {
                new CultureInfo("en-US"),
                new CultureInfo("de-DE")
            };

            app.UseRequestLocalization(new RequestLocalizationOptions
            {
                DefaultRequestCulture = new RequestCulture("de-DE"),
                SupportedCultures     = supportedCultures,
                SupportedUICultures   = supportedCultures
            });

            app.UseMvcWithDefaultRoute();
}

public class SampleController : Controller
{
        public IActionResult Action(DateTime dateParameter)
        {
            return this.Content(dateParameter.ToShortDateString());
        }
}