Shticky Guy -Simple: Make it on Pessach/Shabbos morning Kiddush. Why not then? It does not have to be davka at night.
Logician – BTW, the main thing is to give the brocho to the family and nichum aveilim for the torah the child forgot. On Yom Kippur you can make a nice “sheves achim” and sing some Shabbos zmiros, which you didnt say in shul.