Definitions

1. adjective

Tending to misjudge or assign an incorrect date to something, especially an event or a memory.

“The historian’s misdateful account of the revolution led to several inaccuracies in her book.”

2. adverb

In a way that involves misjudging or assigning an incorrect date to something.

“She recalled the event misdatefully, thinking it had occurred a year earlier than it actually did.”