>> Why don’t you show us all your “First Day” meetings.... <<
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What daniel seems to be missing is that each of those “first day” meetings that are mentioned, are a part of one of the feasts, except for the collection of monetary offerings which cannot be done on a sabbath.
That is an interpretation in such places as Acts 20:7, and i read two sides, and am not convinced of your take on it, while it is far more important how you see sabbath and feast keeping and dietary laws being a necessary part of salvific faith obedience.