When loading an existing save after having changed the dawn-dusk-morning-evening values, it fails and throws this error (yes, I have checked that the inputted values are valid):
Error while running event diurnal-dynamics::on_configuration_changed
Dusk must be < evening.
stack traceback:
[C]: in function 'newindex'
__diurnal-dynamics/control.lua:48: in function 'set_day_time'
diurnal-dynamics/control.lua:54: in function 'set_darkness_planet'
diurnal-dynamics/control.lua:72: in function 'set_darkness'
diurnal-dynamics/control.lua:96: in function <diurnal-dynamics/control.lua:94>
