'Day' in the Bible

{I am thankful} to God, whom I have served with a clear conscience {as my ancestors did}, when {I remember you constantly} in my prayers night and day,

for which reason also I suffer these [things]. But [I am] not ashamed, because I know in whom I have believed, and I am convinced that he is able to guard [what] I have entrusted until that day.

May the Lord grant him to find mercy from the Lord in that day! And how much he served [me] in Ephesus you know very well.

Finally, the crown of righteousness is reserved for me, that the Lord, the righteous Judge, will award to me on that day, and not only to me, but also to all who have loved his appearing.