Converting UTC to Local Time via Azure Functions and Logic Apps

TimeZoneConverterHttpTrigger.cs

[FunctionName("TimeZoneConverterHttpTrigger")]
public static async Task<IActionResult> Run([HttpTrigger(AuthorizationLevel.Function, "post", Route = "convert/timezone")]HttpRequest req, TraceWriter log)
{
  // Suppress Date/Time string to be converted to DateTime object.
  var settings = new JsonSerializerSettings() { DateParseHandling = DateParseHandling.None };
  dynamic body = JsonConvert.DeserializeObject(await req.ReadAsStringAsync().ConfigureAwait(false), settings);

  var input = (string)body?.input;

  var utc = DateTimeOffset.TryParse(input, null, DateTimeStyles.AssumeUniversal, out DateTimeOffset result)
            ? result
            : DateTimeOffset.MinValue;
  if (utc == DateTimeOffset.MinValue)
  {
    var error = new { messagae = "Invalid Date/Time" };

    return new BadRequestObjectResult(error);
  }

  var aest = TimeZoneInfo.FindSystemTimeZoneById("AUS Eastern Standard Time");
  var output = TimeZoneInfo.ConvertTime(utc, aest);

  var response = new { input = input, output = output };
  return new OkObjectResult(response);
}