Watch face changing at night

Changing at night suggests that you might have the Low Power watch face enabled in the Battery Saver settings in the Power Manager.

Thanks for the reply.

I'll take a look at the settings but its strange as I haven't changed any of the settings. Could they have been changed automaticaly perhaps when I upgraded the software?

I have the same issue- at night the watch face changes. It actually stays changed after night hour set. I have double-checked that in the power management, it is set to "No changing face." Any ideas ?
also I can't change in manually when I see it.