The Authority of Christ and the First Day Sabbath

Which is the true day of worship for Christians - Saturday or Sunday? Listen to: the clear teachings of Scripture, the Apostles and the Early Church Fathers.

“Those from among you shall build the old waste places;
you shall raise up the foundations of many generations;
and you shall be called the Repairer of the Breach,
the Restorer of Streets to Dwell In.” Isaiah 58:12