in Thoreau’s Journal:

It is remarkable by what a gradation of days which we call pleasant and warm, beginning in the last of February, we come at last to real summer warmth. At first a sunny, calm, serene winter day is pronounced spring, or reminds us of it.

And even the first pleasant spring day, perhaps, we walk with our great-coat buttoned up, and gloves on.  [Photo:  March 20, 2017]