Is it still cold on Arbor Day every year?

It's not cold in the south and cold in the north every Arbor Day. According to relevant public information, China has a vast territory, the north and the south are far apart, and the climate temperature difference is also large. Arbor Day in China is scheduled for March 12. At this time, it is still mid-spring. The south is already full of flowers, but the north is still freezing. Relatively speaking, the Arbor Day in the south is warm and full of spring. On the contrary,