Hello @nabi-8, thank you for your feedback!
Right now there is an available plugin on the desktop version (or browser on your mobile phone) 'Sun position' which will tell you the time of sunrise and sunset, golden hour and more. You can find the plugin in Menu > Install Windy plugin
Data are updated two times a day so the forecast stays the same for 12 hours for both, 3-hour and 1-hour forecast. If you want to see more specific forecast, 1-hour option is available with our Windy Premium subscription :)