predate

To mark or designate with a date earlier than the actual one.

To precede in time; antedate.

To antedate; date before the actual time: as, to predate a bond.

To possess an earlier date than; precede in date.

To date anticipation; to affix to (a document) an earlier than the actual date; to antedate.

To prey upon something.

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.)

A publication, such as a newspaper or magazine, that is issued with a printed date later than the date of issue.

establish something as being earlier relative to something else