Original sentence: Yet it is only in the west that some Christians describe the sabbath as being transferred to Sunday, the first day of the week, merged with the Lord's Day and the day of Christ's resurrection, forming (in some traditions) a "Christian Sabbath"
Edited sentence: Yet it is only in the west that some Christians describe the sabbath as being transferred to Sunday, the first day of the week and which is the seventh day for most Christians and Muslims and I'm the ISO 8601, merged with the Lord's Day and the day of Christ's resurrection, forming (in some traditions) a "Christian Sabbath"