Nunc Pro Tunc
[Latin, Now for then.] When courts take some action nunc pro tunc, that action has retroactive legal effect, as though it had been performed at a particular, earlier date.
The most common use of nunc pro tunc is to correct past clerical errors, or omissions made by the court, that may hinder the efficient operation of the legal system. For example, if the written record of a trial court's judgment failed to correctly recite the judgment as the court rendered it, the court has the inherent power to change the record at a later date to reflect what happened at trial. The decision, as corrected, would be given legal force from the time of the initial decision so that neither party is prejudiced, or harmed, by the error. The purpose of nunc pro tunc is to correct errors or omissions to achieve the results intended by the court at the earlier time.