GESSIOD

"When the Pleiades rise, start harvesting"; “When Sirius is overhead, cut trees”; “When the Pleiades are about to set, start plowing” (set at dawn - early November); "When Orion and Sirius go to the middle of the sky - pick grapes"; “50 days after the solstice, goods can be transported by sea for sale”; “Arcturus appears in the evening - cut the vines; “With the setting of Orion and the Pleiades, the year is completed.”
GESSIOD