Why Do Christians Worship on Sundays?

It’s not a matter of Bible trivia or historical oddities. It’s a matter of redemption. The conundrum can be stated simply. God commanded Israel to “remember the Sabbath, to keep it holy” (Ex. 20:8). This meant the seventh day of the week—Saturday. But Christians worship on Sunday, the first day of the week. Why do Christians do this? Are we disobeying the fourth commandment?