Elexa, The Sabbath is much more that a time of reflection, this is a gift from our Lord, God. It is also a commandment of God. It is the time to be one with God, asking for forgiveness asking for blessings. Originally these were the days for sacrafic's to our Lord, God. Until that day that Christ, His Son, became the sacrafic for all.
A polition made the first move to Sunday sabbath, Constitine in the 4the century. The Catholics make it official in the 11th century. Neither God nor His Son, changed that day.