Charles Ellicott Commentary Genesis 8:22

"While the earth remaineth, seedtime and harvest, and cold and heat, and summer and winter, and day and night shall not cease." — Genesis 8:22 (ASV)

While the earth remains ... — The traditional interpretation of this verse among the Jews represents the year as divided into six seasons. But this is untenable; for in Palestine itself there are two seed times: the winter crops are put into the ground in October and November, and the summer crops in January and February.

Really, the verse describes those great alternations upon which the well-being of the earth depends—whether considered absolutely, as of light and darkness, cold and heat; or with reference to man’s labours, as of sowing and harvesting; or relatively with respect to vegetation, winter being earth’s time of rest, and summer that of its activity.

As regards these promises, Delitzsch considers that they probably came to Noah as strong inward convictions in answer to his prayers during the sacrifice.