What was the date of Constantine's famous Sunday law?

Answer

AD. 321.

Why are we admonished to fear God and keep His commandments?
What system was established on account of man's transgression of the law of God?
What does God say the Sabbath will be to those who hallow it, or keep it holy?
What was decreed by the Council of Laodicea, in AD. 364?
What sign was to follow the darkening of the sun and the moon?
What did the Lamb do with this book?
Of what are the twelve gates composed?

Questions & Answers are from the book Bible Readings for the Home Circle