I have long assumed that this language tradition has its origin in the fact that we are a diurnal species and naturally prefer day to night. However, I'd be ver

I have long assumed that this language tradition has its origin in the fact that we are a diurnal species and naturally prefer day to night. However, I'd be very interested to know if this kind of metaphor is as common in non-European languages or if its usage changed as Europeans came into greater contact with other cultures.