Amends GS 115C-84.2(d), which requires local boards of education to determine the opening and closing dates of public schools within specified parameters and dates, subject to a the State Board of Education providing a waiver of the opening date parameters for good cause. Revises the subsection to eliminate the specified parameters and dates, granting local boards more flexibility in determining the dates of opening and closing the public schools, including the dates for year-round schools, providing for the required instructional days and hours set forth in subdivision (a)(1). Makes conforming changes. Applies beginning with the 2021-22 school year.