The Barddas of Iolo Morganwg, Vol. I., ed. by J. Williams Ab Ithel, , at sacred-texts.com
Some of the ancient Bards divide the year as follows:--Harvest; Winter; Spring; and the beginning of Summer. 1
419:1 p. 418
The calends of winter, rough is the weather,
Unlike to the beginning of summer.--Ll. Hen.