There's an android app for it even: https://f-droid.org/en/packages/com.aragaer.jtt/ https://f-droid.org/en/packages/com.aragaer.jtt/ I just started using it r

There's an android app for it even: https://f-droid.org/en/packages/com.aragaer.jtt/ https://f-droid.org/en/packages/com.aragaer.jtt/ I just started using it recently and I really like it. My mood is very much affected by exposure to daylight and it really helps to plan my day around the sun, rather than arbitrary numbers on a clock.