Or, if you want to know when the best time might be to cut off the grape clusters Hesiod determines it is: " when Orion and Sirius come into mid-heaven... and rose-fingered dawn meets Arcturus."
Arcturus (/ɑːrkˈtjʊərəs/; αBoo, αBoötis, AlphaBoötis) of the constellation Boötes is the brightest star in the northern celestial hemisphere. With a visual magnitude of−0.05, it is the fourth brightest star in the night sky, after −1.46magnitude Sirius, −0.86magnitude Canopus, and −0.27magnitude Alpha Centauri. It is a relatively close star at only 36.7 light-years from Earth, and, together with Vega and Sirius, one of the most luminous stars in the Sun's neighborhood.