In the U.K. the law states anything described as an antique must be 100 years or more old, which is why U.K. businesses, Antique Fairs and Auctions state they sell or offer Antiques and Collectables. If anything sold and described as an antique is not 100 years or more old, the seller can face prosecution.
I think this the U.K. description of antiques is a good one, but, unfortunately, other countries and in particular the States describe things from the 1980's as antique.