What Day Is The Vernal Equinox In 2024 Calendar. An equinox is one of two days in the year when the sun crosses the equator and day and night become equal in length. Noaa) when is the first day of fall in 2024?
The vernal equinox โ is an astronomical phenomenon when the sun, in its visible motion along the ecliptic, crosses the celestial equator. For the model e ar5 simulations, all years have exactly 365 days and vernal equinox always occurs on march 21, hour 0.