Equinox

päiväntasaus

(one of the two times in the year when the length of the day and night are equal, which occurs when the apparent path of the Sun intersects with the equatorial plane of the Earth)

päiväntasaus

(circumstance of a twenty-four hour time period having the day and night of equal length)

tasauspiste

(one of the two points in space where the apparent path of the Sun intersects with the equatorial plane of the Earth)