God blessed the day

Did you ever wonder/question why Seventh-day Adventists worship on Saturday instead of Sunday as many Christians do? 

The Bible says:

And on the seventh day God ended his work which he had made; and he rested on the seventh day from all his work which he had made.
And God blessed the seventh day, and sanctified it: because that in it he had rested from all his work which God created and made.  Genesis 2:2,3. 

And God spoke all these words saying . . . Remember the sabbath day, to keep it holy. Exodus 20:1, 8.