If the statute does not involve a suspect or quasi-suspect classification, then rational basis review applies, in which a court must ask whether the statute is rationally-related to a legitimate governmental interest.
Autumn Foliage Color. The Process of Leaf Color Change. Leaves change color during the autumn because the amounts of pigments change as the leaves prepare to fall from the trees. All leaves gradually lose chlorophyll during the growing season, and this loss accelerates before leaf fall.
Vegetable Planting Dates for Nebraska. Why Leaves Change Colors This site explains, in simple terms, how summer foliage is transformed into a vivid autumn palette; how weather conditions affect colors; and how the shortening days and the declining intensity of sunlight start the color transformation.