Christ did not rise on Sunday.
Scripture says he did.
Mar 16:1 And when the sabbath was past, Mary Magdalene, and Mary the mother of James, and Salome, had bought sweet spices, that they might come and anoint him.
Saturday/Sabbath was passed...that makes it Sunday.
Mar 16:2 And very early in the morning the first day of the week, they came unto the sepulchre at the rising of the sun.
Again, it was early the first day, Sunday.
Mar 16:3 And they said among themselves, Who shall roll us away the stone from the door of the sepulchre?
Mar 16:4 And when they looked, they saw that the stone was rolled away: for it was very great.
Mar 16:5 And entering into the sepulchre, they saw a young man sitting on the right side, clothed in a long white garment; and they were affrighted.
Mar 16:6 And he saith unto them, Be not affrighted: Ye seek Jesus of Nazareth, which was crucified: he is risen; he is not here: behold the place where they laid him.
It is Sunday and he has risen.
Mar 16:7 But go your way, tell his disciples and Peter that he goeth before you into Galilee: there shall ye see him, as he said unto you.
Mar 16:8 And they went out quickly, and fled from the sepulchre; for they trembled and were amazed: neither said they any thing to any man; for they were afraid.
Mar 16:9 Now when
Jesus was risen early the first day of the week, he appeared first to Mary Magdalene, out of whom he had cast seven devils.
"Jesus was risen early the first day of the week"
Again, Jesus rose early on that Sunday, left the tomb and eventually contacts Mary who had gone to anoint his body but of course he rose a little before she arrived.
Another thing that doesn't hold up under biblical scrutiny is the myth that Paul taught on Sunday
You weren't right about when Christ rose, why would you be right here?
Acts 20:7 And upon
the first day of the week, when the disciples came together to break bread,
Paul preached unto them, ready to depart on the morrow; and continued his speech until midnight.
Here it is a Sunday and Paul preached. This is the basis of Christians going to church on a Sunday to hear preaching.