timeInISO8601Format

void main() {
  print(getTimeInISO8601());
}

String getTimeInISO8601() {
  var ct = DateTime.now().toUtc();
  String year = ct.year.toString().padLeft(4,'0');
  String month = ct.month.toString().padLeft(2,'0');
  String day = ct.day.toString().padLeft(2,'0');
  String hour = ct.hour.toString().padLeft(2,'0');
  String min = ct.minute.toString().padLeft(2,'0');
  String sec = ct.second.toString().padLeft(2,'0');
  String timeUTC = '$year-$month-${day}T$hour:$min:${sec}Z';
  return timeUTC;
}