nunc pro tunc (n<<schwa>>ngk proh t<<schwa>>ngkornuungk proh tuungk). [Latin “now for then”] Having retroactive legal effect through a court’s inherent power <the court entered a nunc pro tunc order to correct a clerical error in the record>. [Cases: Judgment 273, 326; Motions 54.C.J.S. Judgments §§ 123–125, 299; Motions and Orders § 51.]
“When an order is signed ‘nunc pro tunc’ as of a specified date, it means that a thing is now
done which should have been done on the specified date.” 35A C.J.S. Federal Civil Procedure §§ 370, at 556 (1960).
[Blacks Law 8th]