N.Y. Gen. Bus. Law § 6

§ 6. Persons observing another day as a Sabbath. It is a sufficient\ndefense to a prosecution for work or labor on the first day of the week\nthat the defendant uniformly keeps another day of the week as holy time,\nand does not labor on that day, and that the labor complained of was\ndone in such manner as not to interrupt or disturb other persons\nobserving the first day of the week as holy time.\n