Q. Can one take advantage of a sale that is given on a non-Jewish religious holiday or is it as agreeing to the spirit of the celebration? How about Black Friday?
A. Horav Shlomo Millers Shlit"a opinion is that seasonal sales do not have religious significance and are only secular business activities. Black Friday is only a reflection of the economic success expected, as opposed to "being on the red." Unquestionably, that seems to be the generalized custom today.
Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit"a,
Important Numbers
