POSTDATE

A date on a document later than the real date on which it was written.

To occur after an event or time; to exist later on in time

To assign an effective date to a document or action later than the actual date

"to postdate a contract, that is, to date it later than the time when it was in fact made"

To affix a date to after the event.

Postdated; made or done after the date assigned.