Red moon month falls on the summer solstice. In red month the days are the longest and nights are the shortest in the year. Violet moon month falls on the winter solstice. In violet month the days are the shortest and nights are the longest in the year. Green moon month of spring falls on the spring equinox and green moon month of autumn falls on the autumn equinox. In green month the length of day is equal to the length of night.
keywords: sun year, moon months, wheel of the year, rainbow colors