In Matthew 5:17, Jesus said “Do not think that I have come to abolish the law or the prophets. I have come not to abolish but to fulfill.” Yet in Mark 2:27-28, He reminded us that “The sabbath was made for man, not man for the sabbath. That is why the Son of Man is lord even of the sabbath”
Is this a contradiction? No! Jesus healed the sick on the Sabbath. He proclaimed the Gospel. He chased demons on the Sabbath! But He also let His disciples pick the grains from the field on the Sabbath day because they were hungry and needed food for their bodies, which are the temple of God, just as King David and his men did when they ate the consecrated food in the temple. Anything done in the spirit of giving glory to God is keeping the Sabbath holy.
Let us on the Sabbath day stand in front of Him, to whom all glory and praise is due, and worship!