GoldenHour.swift

class GoldenHour {
    var locationName: String?
    var start: Date?
    var end: Date?
    var latitude: CLLocationDegrees?
    var longitude: CLLocationDegrees?
}

GoldenHourViewModel.swift

class GoldenHourViewModel {
    private var goldenHour : GoldenHour
    private var delegate: HomeScreenDelegate
    
    init(_ delegate: HomeScreenDelegate) {
        self.goldenHour = GoldenHour()
        self.delegate = delegate
    }
    
    var goldenHourStart: String {
        guard let startTime = goldenHour.start else {
            return "--:--"
        }
        
        guard let endTime = goldenHour.end else {
            return "--:--"
        }
        
        let fallsBetween = (startTime...endTime).contains(Date())
        if(fallsBetween){
            return "Now"
        }
        
        let dateFormatter = DateFormatter()
        dateFormatter.dateFormat = "HH:mm"
        return dateFormatter.string(from: startTime)
    }

    func calculateGoldenHour(currentLocation: CLLocation) {
        let latitude = currentLocation.coordinate.latitude;
        let longitude = currentLocation.coordinate.longitude;
        let url = "https://api.sunrise-sunset.org/json?lat=\(latitude)&lng=\(longitude)&formatted=0"
        Alamofire.request(url).responseJSON { (response) in
            guard let json = response.data else {return}
            let data = JSON(data: json)
            guard let sunSetTimeInString = data["results"]["sunset"].string else {return}
            guard let sunSetTime = sunSetTimeInString.dateFromISO8601 else {return}
            let goldenHourStart = Calendar.current.date(byAdding: .hour, value: -1, to: sunSetTime)
            self.goldenHour.start = goldenHourStart
            self.goldenHour.end = sunSetTime
            self.delegate.updateView()
        }
    }
  //and more
}

ViewController.swift

protocol HomeScreenDelegate {
    func updateView()
}

class ViewController: UIViewController, HomeScreenDelegate {
    @IBOutlet var temperatureLabel: UILabel!
    @IBOutlet var notificationsButton: UIButton!
    @IBOutlet var locationName: UILabel!
    @IBOutlet var coordinatesLabel: UILabel!
    @IBOutlet var goldenHourLabel: UILabel!
    @IBOutlet var weatherLabel: UILabel!
    
    let locationManager = CLLocationManager()
    var goldenHourViewModel : GoldenHourViewModel!
    var weatherViewModel: WeatherForecastViewModel!
    
    override func viewDidLoad() {
        super.viewDidLoad()
        goldenHourViewModel = GoldenHourViewModel(self)
        weatherViewModel = WeatherForecastViewModel(self)
        locationManager.requestWhenInUseAuthorization()
        onLocateMe()
    }
    
    @IBAction func onLocateMe() {
        let canUseLocation = CLLocationManager.authorizationStatus() == CLAuthorizationStatus.authorizedWhenInUse;
        if(canUseLocation) {
            guard let currentLocation = locationManager.location else {return};
            goldenHourViewModel.calculateGoldenHour(currentLocation: currentLocation)
            weatherViewModel.fetchForecast(currentLocation)
        }
    }
    
    internal func updateView(){
        locationName.text = goldenHourViewModel.locationName
        coordinatesLabel.text = goldenHourViewModel.coordinates
        goldenHourLabel.text = goldenHourViewModel.goldenHourStart
        temperatureLabel.text = weatherViewModel.temperature
    }
  //and some more minor methods
}