antedate (v.)

1580s, "to date before the true time," earlier as noun meaning "a backdating, false early date attached to a document or event" (1570s); from Latin ante "before" (from PIE root *ant- "front, forehead," with derivatives meaning "in front of, before") + date (v.1). Meaning "be of older date than" is from 1660s. Related: Antedated; antedating.