an·te·date
/ˈæntıˌdeıt/ verb , -dates, -dat·ed, -dat·ing [ + obj ]
formal
1 : to give an earlier date rather than the actual date to (something)
antedate a check
— opposite postdate
2 : to be earlier or older than (something) : predate
The church antedates the village itself.
— opposite postdate