Applicable only to Lincoln County Schools and Iredell-Statesville Schools, requires their school calendars under GS 115C-84.2 to include a winter break starting on any day in the month of December and consisting of 14 consecutive days with no instructional days or teacher workdays scheduled. Specifies that if a local board of education has had to close schools due to inclement weather for three or more days before the winter break has started, the local board may elect to make up the days the school was closed during the winter break. Changes the opening day of school for these districts to no earlier than the Wednesday closest to August 13 (was, the Monday closest to August 26) and the closing day to no later than June 1 (was, no later than the Friday closest to June 11). Applies beginning with the 2025-26 school year.