'Day' in the Bible

which has come to you; even as it is in all the world and is bearing fruit and growing, as it does in you also, since the day you heard and knew the grace of God in truth;

For this cause, we also, since the day we heard this, don't cease praying and making requests for you, that you may be filled with the knowledge of his will in all spiritual wisdom and understanding,

Let no one therefore judge you in eating, or in drinking, or with respect to a feast day or a new moon or a Sabbath day,