It has been lovely warm weather and now it is cold again and frost is predicted. I heard it referred to as "Blackberry Winter" this morning.
I looked it up to see if it is the opposite of Indian Summer. It is. Indian Summer is a short return to summer-like weather in autumn. Blackberry Winter is a cold snap during spring. It has different names, (like dogwood winter) but basically was a way for farmers to know when to plant their crops...after blackberry winter.