The Probert Encyclopaedia of General Information

AUTUMN

Autumn is the season between summer and winter, in the northern hemisphere traditionally regarded as embracing August, September, and October, or three months about that time. The beginning of the astronomical autumn is September the 22nd, the autumnal equinox; and the end is December the 21st, the shortest day. The autumn of the southern hemisphere takes place at the time of the northern spring.
Research Autumn