<P> The equinoxes , along with solstices , are directly related to the seasons of the year . In the northern hemisphere , the vernal equinox ( March ) conventionally marks the beginning of spring in most cultures and is considered the start of the New Year in Hindu calendar and the Persian calendar or Iranian calendars as Nowruz ( means new day ) , while the autumnal equinox ( September ) marks the beginning of autumn . </P>
<P> The equinoxes , along with solstices , are directly related to the seasons of the year . In the northern hemisphere , the vernal equinox ( March ) conventionally marks the beginning of spring in most cultures and is considered the start of the New Year in Hindu calendar and the Persian calendar or Iranian calendars as Nowruz ( means new day ) , while the autumnal equinox ( September ) marks the beginning of autumn . </P>
when does the equinox occur in the northern hemisphere
when does the equinox occur in the northern hemisphere
March
March