Adds an extra layer of immersion to RimWorld by implementing different types of body clocks for animals - foxes for instance will actually sleep through the day and roam during the night just like real life!
There are now three types of circadian rhythms implemented in RimWorld:
Diurnal - Animals are awake during the day and sleep through the night. This is the default vanilla behaviour.
Nocturnal - Animals are awake during the night and sleep through the day. This matches a night owl's sleeping schedule.
Crepuscular - Animals are awake during mornings and evenings, and rest through the peak of day and the dead of night.