The Sabbath day regulation that God gave to His people was to be both for their blessing and was to be a sign to the world around that these people were different and belonged to God. The command was quite strong, not even allowing for any cooking to be done on the Sabbath day (v.3). All meals had to be prepared ahead of time on Friday, and they were to be eaten cold.
Now it certainly was nice to have a day of rest, but Israel eventually began to grow restless under this restriction. In Amos 8 we read these words.
Hear this, you who trample on the needy
and bring the poor of the land to an end,
saying, “When will the new moon be over,
that we may sell grain?
And the Sabbath,
that we may offer wheat for sale,
that we may make the ephah small and the shekel great
and deal deceitfully with false balances,
that we may buy the poor for silver
and the needy for a pair of sandals
and sell the chaff of the wheat?”
(Amos 8:4-6 ESV)
As the world of business grew and developed in the land the Sabbath day restrictions became a big bother. The people were no longer excited to honor the Lord, but turned their hearts to their own passions and desires, in this case it making money and oppressing the poor while they were at it.
Now Christians do not live under these same strict Sabbath regulations. Passages like Acts 15 and Romans 14:5 show us that Christ has fulfilled the law for us and we live in freedom. But the core question that we have to deal with is the same as that for Israel. Do we love to honor God and seek Him in life, or are we focused instead on our own passions? A Christian is one who has given their whole heart to Jesus Christ. The natural outcome of that is that we love to use our days to turn our hearts towards Him more and more.