from
Bouvier's Law Dictionary, Revised 6th Ed (1856)
NUNC PRO TUNC, practice. This phrase, which signifies now for then, is used
to express that a thing is done at one time which ought to have been
performed at another. Leave of court must be obtained to do things nunc pro
tunc, and this is granted to answer the purposes of justice, but never to do
injustice A judgment nunc pro tunc can be entered only when the delay has
arisen from the act of the court. 3 Man. Gr. & Sc. 970. Vide 1 V.. & B. 312;
1 Moll. R. 462; 13 Price, R. 604; 1 Hogan, R. 110.