N.Y. Gen. Constr. Law § 24

§ 24. Public holidays; half-holidays. The term public holiday includes\nthe following days in each year: the first day of January, known as New\nYear's day; the third Monday of January, known as Dr. Martin Luther\nKing, Jr. day; the twelfth day of February, known as Lincoln's birthday;\nthe third Monday in February, known as Washington's birthday; the last\nMonday in May, known as Memorial day; the second Sunday in June, known\nas Flag day; the nineteenth day of June, known as Juneteenth; the fourth\nday of July, known as Independence day; the first Monday in September,\nknown as Labor day; the second Monday in October, known as Columbus day;\nthe eleventh day of November, known as Veterans' day; the fourth\nThursday in November, known as Thanksgiving day; and the twenty-fifth\nday of December, known as Christmas day, and if any of such days except\nFlag day is Sunday, the next day thereafter; each general election day,\nand each day appointed by the president of the United States or by the\ngovernor of this state as a day of general thanksgiving, general fasting\nand prayer, or other general religious observances. The term\nhalf-holiday includes the period from noon to midnight of each Saturday\nwhich is not a public holiday.\n