The seventh day Adventists are known mainly for one thing, and that is, worshipping on Saturday, because it is the seventh day of the week, and that is when the sabbath is. Not only that, they bash many people for not keeping the sabbath. This page will refute their bashing of Sunday worship.
They bash us for not keeping the sabbath by worshipping on Sunday rather than Saturday. First off, the sabbath is for the children of Israel. Consider below.
Exodus 31:16-17-  Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant.  It is a sign between me and the children of Israel for ever: for in six days the Lord made heaven and earth, and on the seventh day he rested, and was refreshed.
Second of all, Sunday worship has nothing to do with the sabbath. It is for the celebration of the resurrection of Christ. I have seen seventh dayists counter this claim by trying to say that Jesus rose on the sabbath, the seventh day of the week. Excuse me, but the Gospel accounts make it very clear that Jesus rose on the first day of the week. Consider below.
Matthew 28:1-6-  In the end of the sabbath, as it began to dawn toward the first day of the week, came Mary Magdalene and the other Mary to see the sepulchre.  And, behold, there was a great earthquake: for the angel of the Lord descended from heaven, and came and rolled back the stone from the door, and sat upon it.  His countenance was like lightning, and his raiment white as snow:  And for fear of him the keepers did shake, and became as dead men .  And the angel answered and said unto the women, Fear not ye: for I know that ye seek Jesus, which was crucified.  He is not here: for he is risen, as he said. Come, see the place where the Lord lay.
Mark 16:1-6-  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.  And very early in the morning the first day of the week, they came unto the sepulchre at the rising of the sun.  And they said among themselves, Who shall roll us away the stone from the door of the sepulchre?  And when they looked, they saw that the stone was rolled away: for it was very great.  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.  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.
Luke 24:1-7-  Now upon the first day of the week, very early in the morning, they came unto the sepulchre, bringing the spices which they had prepared, and certain others with them.  And they found the stone rolled away from the sepulchre.  And they entered in, and found not the body of the Lord Jesus.  And it came to pass, as they were much perplexed thereabout, behold, two men stood by them in shining garments:  And as they were afraid, and bowed down their faces to the earth, they said unto them, Why seek ye the living among the dead?  He is not here, but is risen: remember how he spake unto you when he was yet in Galilee,  Saying, The Son of man must be delivered into the hands of sinful men, and be crucified, and the third day rise again.
Now you might try to say something like “He could have risen on the sabbath and they just didn’t discover it until the next day.” Well, let us go back to Mark 16 but skip down to verse 9.
Mark 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.
The entire antithesis of the seventh day adventists is refuted with just one, but the most powerful event in the Bible, therefore the most powerful event in history. However, let us end with another one of their dumb arguments. They say Sunday worship is worshipping the pagan sun god. Guess what though, I can say they are worshipping the Roman god saturn. So there. In the name of The Lord Jesus Christ I write unto you. Amen.