When Is Equinox 2024 Uk. The equinox in the northern hemisphere occurs twice a year around 20 march (the spring equinox) and around 22 september (the autumn equinox). This sunday, the autumnal equinox is upon us, and with it, a shift to shorter days, longer nights and the astronomical start of fall in the northern.
However, the astronomical calendar is based on the position of the sun in relation to the earth and changes. Find out more about equinoxes and solstices.
