2024 Spring Equinox Date Time And Calculator. On this date, the day is equal in length to the night. The true sun method calculates a cross‑quarter day based on the time at which the earth reaches that point in its orbit which is spatially (that is, geometrically) exactly midway between its positions at the solstice (or equinox) and the subsequent equinox (or solstice).

For spring equinoxes for the next 12 years scroll down the page. Graph presents the solstice and equinox time and dates with time zones for cities throughout the year.