N.Y. Comp. Codes R. & Regs. tit. 14, § 620.13
(i) Days—business. In computing “days”, the “day” that the notice is received shall be included. Saturdays, Sundays, and legal holidays are not included in counting business days. Legal holidays are:
(m) Plans. Formal statements or documents representing future courses of action. Plans relevant to this Part include: