This is the element Wood. The predominate atmospheric energy in the spring, the Wood time of year, is Wind. The summer is the most Yang time of the year. In fact, Yang enrgy gets so intense at this time of year that it starts to change into its opposite. The fall is the time of waning Yang and increasing Yin.
People start to slow down, gather inward for the approaching winter.
Winter is the most Yin time of year, but after several weeks of being restricted indoors, people begin to long for increased activity and letting loose and getting out. Cabin fever as it's called in the West. I want to go somewhere, do something. Yin begins to decrease and Yang increases in the spring. There are relationships between the 5 Elements which can be used in healing.