Some have claimed that “for the last 2000 years most Christians have not believed in a young earth and it is only in the last half century that it has become a big issue for some Christians.”
Augustine, Luther, Calvin, Wesley and many of the great Christian commentary authors have considered the age of the Earth to be young.
See this resource: https://creation.com/british-scriptural-geologists-in-the-first-half-of-the-nineteenth-century-part-1#interpretation
The quote above was from this article: https://www.premierchristianity.com/Blog/10-questions-to-ask-a-young-earth-creationist
