Why Don't The Christians Keep The Sabbath?

[Matthew245]

The Sabbath starts at sunset on Friday evening and ends at sunset on Saturday evening. So, how come the Christians don't celebrate the Sabbath? Jesus didn't do away with it, He celebrated the Sabbath. It wouldn't make sense for Him to celebrate the Sabbath and then do away with it when He died. God did command us to keep this day holy. He wants us to to take a break from worldly affairs.

What do you think?

Is God's Word Darkness?