John 1 has noting to do with the Sabbath. Here's Jon 1:1-5
1In the beginning was the Word, and the Word was with God, and the Word was God. 2The same was in the beginning with God. 3All things were made by him; and without him was not any thing made that was made. 4In him was life; and the life was the light of men. 5And the light shineth in darkness; and the darkness comprehended it not.
Here is the context of Mark 2:23-28
23And it came to pass, that he went through the corn fields on the sabbath day; and his disciples began, as they went, to pluck the ears of corn.
24And the Pharisees said unto him, Behold, why do they on the sabbath day that which is not lawful?
25And he said unto them, Have ye never read what David did, when he had need, and was an hungred, he, and they that were with him?
26How he went into the house of God in the days of Abiathar the high priest, and did eat the shewbread, which is not lawful to eat but for the priests, and gave also to them which were with him?
27And he said unto them, The sabbath was made for man, and not man for the sabbath: 28Therefore the Son of man is Lord also of the sabbath.
So, you see, Jesus is Lord of the Sabbath as well.
Curse??? Where do you get that?
Sunday now belongs to the Jesus Christ, the Son of God who is the Light of the World.