'Day' in the Bible

which are come to you, as they are in all the world, and are bearing fruit and growing, even as also among you, from the day ye heard them and knew indeed the grace of God, in truth:

For this reason we also, from the day we heard of your faith and love, do not cease praying and asking for you, to the end that ye may be filled with the full knowledge of his will, in all wisdom and spiritual understanding,