Do Baptist universally believe that the Sabbath is on sunday?

or is this a church by church affirmation? I am attending a church that I have thought about joining, and I looked at the program today and it said for next weeks easter service that they would have early morning sunday sabbath service. I did a double take because even the catholic church stated in catechism that it never changed the sabbath for christianity. So where would such a affirmation come from? Correct me if I'm wrong, but the sabbath, even in christianity is friday sundown to saturday sundown?