ยง 2586. Anniversary  day as a holiday for pupils in the public schools
  of the borough of Brooklyn and in the borough of  Queens,  city  of  New
  York.    The  first Thursday in June in each year, except in those years
  when the first Thursday in June occurs in the same  week  with  Memorial
  day, and in such years the second Thursday in June, known as anniversary
  day,  and  celebrated  in  commemoration  of  the organization of Sunday
  schools, is hereby made and declared to be a holiday for pupils  in  all
  the  public  schools  in  the  borough of Brooklyn and in the borough of
  Queens, city of New York, and pupils shall not be required to attend the
  public schools in such boroughs on such day.
Structure New York Laws
Title 2 - School District Organization
2550 - Application of Article.
2551 - Board of Education Corporate Body.
2553 - Board of Education; Eligibility; How Chosen; Term of Office; Vacancies.
2554 - Powers and Duties of Board of Education.
2554-A - Powers of Boards of Education to Ban Fraternities, Sororities and Other Secret Societies.
2555 - Kindergartens, Nursery and Night Schools.
2556 - Buildings, Sites, Et Cetera.
2557 - Purchase and Sale of Real Property.
2559 - Power of Removal of Member of Board of Education.
2563 - Meetings of Board of Education.
2564 - Local School Board Districts.
2565 - Superintendent of Schools, Associate Superintendents, Board of Superintendents.
2566 - Powers and Duties of Superintendent of Schools.
2569 - Appointment of Teachers.
2574 - Assistant Superintendents in a City Having a Population of One Million or More.
2575 - Retirement of Employees of Board of Education.
2577 - Annual Financial Report.
2579 - Payment of Obligations.
2580 - Funds; Custody and Disbursement.
2583 - Certain Schools to Report as to Moneys and Attendance; Accidental Omission to Report.