Controller.cs
------------------------------------------------------------------------------------
	[HttpPost]
        [Route("~/api/reports/DownloadCSVDamages/{date}")]
        public HttpResponseMessage DownloadCSVDamages([FromUri]DateTime date)
        {
            HttpResponseMessage result = new HttpResponseMessage(HttpStatusCode.OK);
            return result;
        }

Javascript
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 $scope.downloadCSV = function () {
        var theDate = moment();
        $.ajax({
            type: 'POST',
            url: '/api/reports/DownloadCSVDamages',
            data: theDate
        });
    }