'On that Day' in the Bible

In the six hundredth year of the life of Noah, in the second month, on the seventeenth day of the month--on that day all the springs of the great deep were split open, and the windows of heaven were opened.

On that day Yahweh {made} a covenant with Abram saying, "To your offspring I will give this land, from the river of Egypt to the great river, the Euphrates river,