May I receive catholic holy communion at Sat vigil and again on Sunday for the same Sun mass?
Who is going to stop you? Have you ever seen a priest refuse to give communion to anyone. It is up to you.
Did not Jesus say "Do this as oft as ye do it in remembrance of me."
The Catholic church states you can receive communion once for the same Mass with the same Gospel message. I think what's important is what you feel in your heart. Let your heart give you the answer.
Christ be with you.
Of course. You may receive communion twice in one day if you are at two masses. Sat. Vigil & Sunday are two different days even though the mass is the same one.