Clock widget: how does it decides the dark and light color scheme

It is definitely a daytime/nighttime indicator for that location. I can't tell exactly but it is something like white from 7 AM - 7PM and dark from 7PM - 7 AM

The last person certainly had the right idea. My strong belief is that they base it on the actual projected sunrise/sunset. For example, while I am answering this question EST, London/Paris, +5/+6 hours respectively are both shown as dark clocks and the sun has not risen. I added Mecca temporarily which is +9 and sunrise already happened so the clock is lit. The only reason I noticed initially is that 3 of my clocks are dark, LA/London/Paris, while the 4th, Japan is light.

I am not sure how it works or if it is buggy. Right now, it’s 10:20am in Singapore (after sunrise), but it still shows black background. It is overcast, so it actually is dark but I doubt that this is taken into account ☺️. So my guess is: it should be sunset/sunrise, but it’s buggy.

It’s supposed to be a daytime/nighttime effect but it’s buggy. However, changing the phone’s time from 24hrs to AM/PM fixed that for me. If yours is already set to 12hrs, try changing to 24.

Mine is already on 24-hr time for as long as I can remember, but the clock colors are still wrong. Looks like it's just on random. :(

It's definitely buggy. It's 2300 in NY now and my widget it light there.. wish they would fix it... It's been buggy for ages

I prefer black or white customizable irrespective of daylight time