Set aside one day a week for worship and you will be fine, doesn’t matter which days, when you argue this stuff you will find that whole denominations are built on this one premise. I have no problem with a group worshiping on Saturday or Sunday as long as you or obedient to God’s Word.God has no problem with what day we worship either; He never specified such. However, He did specify a day of rest, and if obedience to the Word is in fact the most important thing, then we should be resting on the 7th day.