March equinox
the equinox on the earth when the Sun appears to leave the southern hemisphere and cross the celestial equator
en-US/ˈmɑɹt͡ʃ ˈikwəˌnɑks/
en-GB/mɑːt͡ʃ ˈiːkwɪnɒks/
the equinox on the earth when the Sun appears to leave the southern hemisphere and cross the celestial equator