The public schools shall observe Calhoun’s birthday, the eighteenth of March of each year, as South Carolina Day and on that day the school officers and teachers shall conduct such exercises as will conduce to a more general knowledge and appreciation of the history, resources and possibilities of this State. If such day shall fall on Saturday or Sunday the Friday nearest to March eighteenth shall be so observed and if any school shall not be in session on such date, the celebration may be held before the close of the term. The State Superintendent of Education shall suggest such topics or programs as he may deem appropriate for the celebration of South Carolina Day.