Section 3604.8 &; 8(b) - Title V, Article 73, Part I
No school shall be in session on a Saturday or a legal holiday, except general election day, Washington's birthday and Lincoln's birthday, and except that driver education classes may be conducted on a Saturday.
A deficiency not exceeding three days during any school year caused by teachers` attendance upon conferences held by superintendents of schools of city school districts or other school districts employing superintendents of schools shall be excused by the commissioner, provided however, notwithstanding any other provision of law, that during the nineteen hundred ninety-two--ninety-three through the two thousand one--two thousand two school years, the commissioner shall excuse a deficiency not exceeding four days during such school year caused by teachers` attendance upon conferences held by such superintendents, provided that at least two such conference days during such school year shall be dedicated to staff attendance upon conferences providing staff development relating to implementation of the new high learning standards and assessments, as adopted by the board of regents. Notwithstanding any other provision of law, rule or regulation to the contrary, school districts may elect to use one or more of such allowable conference days in units of not less than one hour each to provide staff development activities relating to implementation of the new high learning standards and assessments. A district making such election may provide such staff development during the regularly scheduled daily session and apply such units to satisfy a deficiency in the length of one or more daily sessions of instruction for pupils as specified in regulations of the commissioner. The commissioner shall assure that such conference days include appropriate school violence prevention and intervention training, and may require that up to one such conference day be dedicated for such purpose.
Notwithstanding the provisions of subdivision eight of this section, a trustee or board of trustees or a board of education of a school district having fewer than six hundred pupils in grades kindergarten through twelve may provide for classes to be held on any day of the week in connection with educational programs for the disadvantaged operated under the elementary and secondary education act; provided, however, no pupils or teachers shall be required to attend such classes if they observe any such day as a Sabbath or a holy day in accordance with the requirements of their religion.