– It comes directly from Latin through the word dominicus (of the Lord), or dies Domini (day of the Lord). In the Gospels we read that on the first day after the Sabbath the risen Jesus appeared to Mary Magdalene:
Jo 20,1.15-16 : Jesus asked her: “Woman, why are you crying? Who are you looking for?”.
Mark 16:9: On the first day of the week, he appeared first to Mary of Magdala.
– From then on, Christians began to rest and gather on that day in order to commemorate the resurrection of Jesus:
Acts 20:7: On the first day of the week, when we were gathered together to break bread.
1Cor 16,2 : On the first day of the week, each one of you should set aside what he could spare.
Rev 1:10 : On a Sunday, I was raptured in ecstasy.
– Even in the OT, a perfect and perennial worship of the Lord was foreseen:
Mal 1,11 : For from east to west my name is great among the nations and everywhere.
– Christians followed in the footsteps of Jesus who assiduously attended the synagogue and participated in the Jewish feasts:
Mk 1:21 : And already on the Sabbath day, Jesus entered the synagogue and began to teach.
Mk 6:2 : When the Sabbath came, he began to teach in the synagogue.
Lk 2:41 : His parents went to Jerusalem every year for the Passover feast.
Lk 4,16-22.31s : He entered the synagogue on the Sabbath, as was his custom, and got up to read.
Lk 13:10 : Jesus was teaching in the synagogue on a Saturday.
Jn 4,23s : But the hour is coming, and it has already come, when the true worshipers will worship the Father.
At 13:14, 27, 42ff : There they entered the synagogue on the Sabbath and sat down.
Acts 16:13 : On Saturday, we went outside the gate to the river, where we thought there was a place of prayer.
Acts 17:2 : Paul went to them, as was his custom, and for three Saturdays he disputed with them.
Acts 18:4: Every Saturday he spoke in the synagogue and tried to convince the Jews and the Greeks.
Rom 10:17 : Therefore, faith comes from preaching and preaching is exercised by reason of the word of Christ.
