'Season' in the Bible

Now the Jordan overflows its banks throughout the harvest season. But as soon as the priests carrying the ark reached the Jordan, their feet touched the water at its edge

And it cometh to pass, when the king of Ai seeth it, that hasten, and rise early, and go out do the men of the city to meet Israel for battle, he and all his people, at the appointed season, at the front of the plain, and he hath not known that an ambush is against him, on the rear of the city.

And when they cried unto the LORD, he put darkness between you and the Egyptians, and brought the sea upon them, and covered them; and your eyes have seen what I have done in Egypt: and ye dwelt in the wilderness a long season.