Section 810 - Conservation day1. The last Friday in April each year is hereby made and declared to be known as Conservation day, and observed in accordance with the provisions of this chapter, except that for the year nineteen hundred seventy-eight, Conservation day shall be May third.2. It shall be the duty of the authorities of every public school in this state to assemble the pupils in their charge on that day in the school building, or elsewhere, as they may deem proper, and to provide for and conduct (1) such exercises as shall tend to encourage the planting, protection and preservation of trees and shrubs, and an acquaintance with the best methods to be adopted to accomplish such results, and (2) such lectures, pictures or tours, as shall tend to increase the interest and knowledge of such pupils in the fish and wild life, soil and water of the state.3. The commissioner of education may prescribe from time to time a course of exercises and instruction in the subjects hereinbefore mentioned, which shall be adopted and observed by the public school authorities on Conservation day. Upon receipt of copies of such course sufficient in number to supply all the schools under their supervision, the school authorities aforesaid shall promptly provide each of the schools under their charge with a copy, and cause it to be observed.