New York Codes, Rules and Regulations
Title 12 - DEPARTMENT OF LABOR
Chapter IV - Resolution of Labor Disputes
Subchapter A - Labor Relations Board
Part 250 - Definitions And General Provisions
Section 250.12 - Computing time

(a) The term days, as used in this Chapter, shall refer to calendar days.

(b) The term working days, as used in this Chapter, shall not include a Saturday, a Sunday, or a legal State or federal holiday.

(c) In computing any period of time prescribed or allowed by these rules, or by order or direction, the day of the act, event, or default after which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless it falls on a Saturday, a Sunday, or a legal State or federal holiday, in which event the period shall run to the next working day.