Postnate vs Postdate - What's the difference?

As adjectives the difference between postnate and postdate

is that postnate is subsequent while postdate is postdated; made or done after the date assigned.

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

(-)

(archaic) subsequent

The graces and gifts of the spirit are postnate . — Jeremy Taylor.

(Webster 1913)

(postdat)

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.

(both senses) predate

(-)

(obsolete) postdated; made or done after the date assigned.

* Fuller

Of these [predictions] some were postdate , cunningly made after the thing came to pass.

----