Amends GS 115C-84.2(f)(5) (school calendars) to change one of the calendar options under the definition of year round school to be a school year where students attend four quarters with between 43 and 47 days of instructions and with vacation periods of between 14 and 18 days separating each quarter (was, attend 45 instructional days followed by 15 days of vacation repeated throughout the school calendar year). Effective when the bill becomes law and applies beginning with the 2021-2022 school year.