Keeping Sunday in place of the Sabbath is still called....SUNDAY KEEPING....(keeping the day of the sun)
God Says.....
Exodus 20:8,10
God Says.....
Remember the sabbath day, to keep it holy.
But the seventh day is the sabbath of the LORD thy God:Exodus 20:8,10
What Little Horn would do.....
....and think to change times and laws:
Daniel 7:25