Why is it? Yin is more than Yang in a spring, and Yang is more than Yin in a fall.
The base is Yin in a spring, Yang in a fall. Yang is embeded in Yin of a spring and
Yin is embeded in Yang of a fall.
So, I think that the mainstream's vies of seasons in not correct.
In tjis view, the dawn is Yin, the evening is Yang.
Mainstream think in the reverse order.