At the autumnal equinox  the Sun appears to cross the celestial equator, from north to south; this marks the beginning of autumn in the Northern Hemisphere. It's one of two times a year when the Sun crosses the equator, and the day and night are of approximately equal length. From www.inforplease.com

"Now we have reached the autumn of our lives. It is a beautiful season when we feel still full of vigor and much-inspired to continue with our endeavors, though mellowed by time. But we are aware that winter is not far off--only three full months from the end...". Loly Isiderio-Perez