Hu Gadarn’s plough
The changing of the seasons on earth also marks a shift in the ascendancy in the skies, with Bootes taking over from Orion as the most prominent constellation in the heavens. In Welsh mythology, Bootes represents Hu Gadarn, the first farmer to use oxen to pull a plough. The moment at which Hu Gadarn, his yoke (the Roman constellation of Auriga), and ox (Taurus, the bull) first line up after sunset was a reminder to ancient Celts that it was time to plough the fields and sow seeds.