You sound like a science denier to me. In all seriousness, if I have to indicate that is a joke then we've bigger problems than people walking around thinking 1975 didn't happen.
Oh well it may be too late http://www.dc-coin.com/1grabenercoinpressmedallionsaleprice-1-4-4-1-2-2-2-3-2-1-1.aspx
@Shrews1994 if you pull out your redbook it briefly mentions “pieces with this dual dating were coined during 1975 and 1976”