predate
verb
°To designate a date earlier than the actual one; to move a date, appointment, event, or period of time to an earlier point (contrast "postdate".).
°To exist, or to occur before something else; to antedate (the more correct term for this usage.).
noun
°A publication, such as a newspaper or magazine, that is issued with a printed date later than the date of issue.
synonyms: antedate, prey