'Days' in the Bible

So their father Ephraim mourned many days, and his relatives came to comfort him.

Their relatives who lived in their villages were required to visit every seven days to be with them in turn,

every valiant soldier got up, removed the bodies of Saul and his sons, took them to Jabesh, and buried their bones under the tamarisk tree in Jabesh. Then they fasted for seven days.

They spent three days eating and drinking with David, since their relatives had supplied provisions for them.

Either three years of famine, or three months of reversals as you are swept away by your enemies while the sword of your enemies overtakes you, or three days with the sword of the LORD, consisting of pestilence infecting the land, with the angel of the LORD wreaking destruction from border to border throughout all of Israel.' Decide right now what I am to answer to the one who sent me."

For we are aliens and vagrants in your presence, as were all of our ancestors. Our days on the earth pass away like shadows, and we have no hope.