Prochronism

(n.) The dating of an event before the time it happened; an antedating; -- opposed to metachronism.

Thesaurus Entries

antedate, antedating, anticipation, defect, faux pas, flaw, gaffe, metachronism, misapplication, misdate, misdating, mistake, mistiming, parachronism, postdate, postdating, prochronism, prolepsis, slip, solecism