postdate (v.)youdaoicibaDictYouDict[postdate 词源字典]
also post-date, 1620s, from post- + date (v.1) "to assign a date to, to mark a date on." Related: Postdated; postdating. Intransitive meaning "be of an earlier date" is from 1909.[postdate etymology, postdate origin, 英语词源]