While the earth remains, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease.
All Commentaries on Genesis 8:22 Go To Genesis 8
George Leo Haydock
Seed-time, according to the Targum of Jonathan, is the equinox of September; harvest, that of March; winter and summer denote the solstice of December and of June. But the Hebrews probably divided the year into summer and winter; or perhaps they might also admit the season of spring, with the Egyptians and the ancient Greeks, who represented the seasons by the three hours, daughters of Jupiter. (Calmet)