antedate
v.
1580s, earlier as noun meaning "a backdating, false early date attached to a document or event" (1570s); from Latin ante "before" (see ante) + date, v.1. Related: Antedated; antedating.
〔李〕[ante-=before 前；date n.日期 ⇒“adate before the actual one 在实际日期之前的日期”→] Ⅰ n. date earlier than actual 比实际要早的日期