I tell you, something greater than the temple is here. And if you had known what this means, ‘I desire mercy, and not sacrifice,’ you would not have condemned the guiltless. For the Son of Man is lord of the Sabbath.”
— Matthew 12:6-8 (ESV)
The Sabbath day is not a religious day. It is a day where the mercy of God is demonstrated: to remember the forgiveness we are given; to show mercy to those around us; and, to intercede for the lost in need of His mercy around the world.