"It is not for you to know the times or the seasons which the Father hath put in His own power."YECreationism grew in the USA from the background of Southern Baptism. The false teaching about God's world started from traditional date calculations using Biblical genealogies as the key.
Acts 1:7 KJ21
So all the generations from Abraham to David are fourteen generations, and from David until the carrying away into Babylon are fourteen generations, and from the carrying away into Babylon unto Christ are fourteen generations.According to the Gospel of Luke there are total of 76 generations from Adam to Jesus. (Luke 3:23-28)
Both groups present religion combined with practical North-American rationalism. The false teachings are based on date calculations; Jehovah Witnesses calculate forward for the coming of the New World and YECreationists calculate backwards for the beginning of the Old World.
Both groups give false picture about the Bible and about God's majestic works of creation. Both represent their own internally logical view of the world in which the real contents of the Bible have less and less importance the focus being on the group's own distinctive subjects.