I do not think you can assume that the objection deadline will be extended just because the hearing has been delayed though. But you could always still argue the unfairness of not extending the objection deadline since the weather was the cause.
January 4, 2018 -- The United States District Court for the Southern District of New York will be closed at all locations, Manhattan, White Plains and Poughkeepsie. Please contact individual chambers for the status of any scheduled proceedings.