Summer Equinox 2024 Uk. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length. The equinox in the northern hemisphere occurs twice a year around 20 march (the spring equinox) and around 22 september (the autumn equinox).
The equinox and solstice dates below are for the northern hemisphere, in the southern. Find london march and september.