Scotland
They held that Saturday was properly the Sabbath on which they abstained from work. "Celtic Scotland," Vol. 2, p. 350
"They worked on Sunday, but kept Saturday in a sabbatical manner...These things Margaret abolished." A History of Scotland from the Roman Occupation," Vol.1, p. 96.
"It was another custom of theirs to neglect the reverence due to the Lord's day, by devoting themselves to every kind of worldly business upon it, just as they did upon other days. That this was contrary to the law, she (Queen Margaret) proved to them as well by reason as by authority. 'Let us venerate the Lord's day,' said she, 'because of the resurrection of our Lord, which happened upon that day, and let us no longer do servile works upon it; bearing in mind that upon this day we were redeemed from the slavery of the devil. The blessed Pope Gregory affirms the same.'" Life of Saint Margaret, Turgot, p. 49 (British Museum Library)
(Historian Skene commenting upon the work of Queen Margaret) "Her next point was that they did not duly reverence the Lord's day, but in this latter instance they seemed to have followed a custom of which we find traces in the early Church of Ireland, by which they held Saturday to be the Sabbath on which they rested from all their labours." Skene, "Celtic Scotland," Vol.2, p. 349