Nunc pro tunc is a phrase used in an order or judgment when the court wants the order or judgment to be effective as of a date in the past rather than on the date the judgment or order is entered into the court record.

Nunc pro tunc es una locución latina utilizada comúnmente en Derecho en inglés. Significa 'ahora por entonces'. En general, una decisión de una corte "nunc pro tunc" se aplica de manera retroactiva para corregir una decisión previa.

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Note added at 47 mins (2021-08-03 04:01:16 GMT)
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In reference to law, a decision is a determination of parties’ rights and obligations reached by a court based on facts and law. A decision can mean either the act of delivering a court’s order or the text of the order itself. The text of a decision usually includes a brief summary of the facts, a discussion of relevant laws, the court’s reasoning and orders. Decision is often used interchangeably with “judgment”, “ruling”, and “order”.