It’s as good as any other day and more convenient than most, because of the way our society is organised! 

The Old Testament seventh day was not replaced by another day of the week. 

Rather, it was replaced by a permanent, every day, ceasing from our own works. Only confusion results from attempting to show that the Old Testament seventh-day observance was replaced by first-day of the week worship. 

This debate misses the point of the New Testament rest, which is a complete every-day Spiritual rest in which we treat every day as holy to the Lord, and accept His offer to rest from our works by adopting His plan for our redemption.