@liw, now's the time to install Suntimes.
After you configure your location and altitude you'll get to have various widgets for sun and moon related events, but also statistics. My favorite is the one comparing the amount of suntime amout tomorrow and today. It's great to see how many more seconds of suntime you'll have tomorrow. I'm filled with joy for every extra minute shown in the widget. But yeah today I had "only" ~560 minutes of sun.
https://f-droid.org/en/packages/com.forrestguice.suntimeswidget/