Q. Can Hatoras Nedorim (an act of absolution of wows done in front of a court of three people) be done at night after Maariv?
A. Shulchan Aruch (Y.D. 228: 3), Rambam (H. Shavuos 6: 6), rule that Hatoras Nedorim can be done at night. Nitei Gavriel (Rosh Hashana 17: 6) maintains that if one can’t do Hatoras Nedorim on Erev Rosh Hashana, he may do it on the night before.
However, some maintain that in the onset, it should be done during the day, as we are careful to recite Kol Nidrei before the sh’kiah (Kol Nidrei p. 781).
Horav Shlomo Miller’s Shlit’a position is similar.
Rabbi A. Bartfeld as advised by Horav Shlomo Miller and Horav Aharon Miller Shlit’a