While many wonderful events in the Bible occurred on certain days of the week, there is no direct command from God to keep them holy.
For instance, Jesus died for our sins on a Friday. That is arguably the most significant event in all of history, marking the moment our death sentence was commuted and our opportunity for salvation assured. But not even one Bible text hints that we should observe this day of such great significance.
However, there is indeed a memorial of the resurrection commanded in the Bible, but it is not keeping Sunday holy. Instead, the apostle Paul wrote, "We were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the ...