Q. Can one make a vort (engagement celebration) on the night after Tisha B’av, when it was pushed off from Shabbos to Sunday (nidche) with some music?
A. See prior question 2291. Other Poskim also permit music on the night after Tisha Beav when it is a nidche (Pischei Teshuvos 558: 3: n. quoting Pri Megodim and Shevet Hakrhosi).
Rabbi A. Bartfeld as advised by Horav Shlomo Miller Shlit’a