'Day' in the Bible

I thank God, whom I serve from my forefathers in a pure conscience, how unceasing is my remembrance of thee in my supplications, night and day

For which cause I suffer also these things: yet I am not ashamed; for I know him whom I have believed, and I am persuaded that he is able to guard that which I have committed unto him against that day.

(the Lord grant unto him to find mercy of the Lord in that day); and in how many things he ministered at Ephesus, thou knowest very well.

henceforth there is laid up for me the crown of righteousness, which the Lord, the righteous judge, shall give to me at that day; and not to me only, but also to all them that have loved his appearing.