Rich Lusk observes that in John’s gospel, the appearance of the resurrected Jesus in successive Sundays to the disciples (John 20:19-31) prove a pattern for worship on the Lord’s Day. He says:
Since the resurrection of Christ every Sunday is the day of the Lord. The switch is symbolically significant. Their special day is the seventh day. Our special day of the week is the first day of the week. The OT saints looked forward to these things, we now possess them.