March Equinox 2025 Exact Time. The equinoxes occur around march 20 and september 22 each year, corresponding to an equal length of day and night. Prepare the haft seen, the traditional table setting for celebrating nowruz in iran, and have your guests gather around it until the exact moment of the spring equinox.

It is a time for balance. On the day of the summer (june) solstice, the solar disk, moving along the ecliptic, will fall into its northernmost point and will be located at the maximum distance north of the celestial equator.