In TCM we view the year as flowing through a continuous cycle of Yin and Yang. Sometimes of the year are more Yin, with a little bit of Yang and sometimes are more Yang with a little bit of Yin.
Winter is the most Yin of all. And on the flip side, Summer is the most Yang of all. So, when we officially pass into Summer later this month, we will experience the fullest expression of Yang and beginning the day after that we will start the slow slide back towards Winter and Yin with Yin.
So, enjoy the buildup of Yang and all that it has to offer!