How was the Sabbath observed in the early church and throughout church history?

Kevin Conway completed his PhD in Biblical Studies at the University of Cambridge. For the last several years, he has served with the para-church ministry, Cru - Eastern Europe, as a team leader and teacher for their staff in Eastern Europe and Russia. He now trains pastors and church leaders with Christian Educators Outreach (CEO). Here he answers questions related to his talk "What Does Sabbath Rest Mean for Christians Today?" given at the 2022 European Leadership Forum.