Why have Christians chosen Sunday as the day of rest?

Question:

Why have Orthodox chosen Sunday as the day of rest, since Saturday is always mentioned in the Bible as the 7th day when God rested after creating the world in six days? In my opinion, the most important is to live each day as the day of the Lord to remember Him and to honor Him properly.

I have previously written articles broadly covering the answer to the question:

1. What is the true day of rest?
2. Is it a sin cleaning up the house on Sunday?
3. About polemics with the Adventists on the Sabbath day
4. What does the Bible say about doubtful things?

If there are any other questions or concerns after reading these articles, I invite you to write them on comments.

Translated by Felicia Rotaru