India, Sept. 23 -- The first day of astronomical autumn arrives in the UK today, September 23. The autumnal equinox marks a seasonal turning point, when the Sun crosses the celestial equator, and the Northern Hemisphere moves from summer towards winter. In astrology, the same shift begins Libra season, bringing themes of balance, relationships and harmony into focus.

According to the Royal Museums Greenwich and Royal Observatory Greenwich the autumnal equinox occurs at 1:06 a.m. BST on September 23, 2026. It says that the September equinox marks the end of summer and the beginning of autumn in the Northern Hemisphere.

The equinox happens when the Sun illuminates the Northern and Southern Hemispheres more evenly. Because of time zone dif...