In spring it is known as the vernal equinox, and in fall the autumnal equinox.

春天是春分，秋天是秋分。

April Fools Day is also been linked to the vernal equinox and the start of spring.

愚人节也被用来庆祝春分和春天的开始。

A wish to shout and sing, As, filled with hope and gladness, We hail the vernal Spring.

我多么想唤和歌唱，我唤春天来了，心中充满了希望和喜悦。

Yesterday was officially the autumnal equinox in the northern hemisphere, and the vernal or Spring equinox in the southern one.

昨天是北半球的秋分，南半球的春分。

The vernal equinox, in March, marks the beginning of spring in the Northern Hemisphere and the beginning of autumn in the Southern Hemisphere.

春分在三月份，标志着北半球春季的开始，以及南半球秋季的开始。

When the ancients first thought up this idea, the Sun was in Aries on March 22, the vernal equinox (what some people call the first day of spring).

当古人一次产生划分星座的想法时，太阳在3月22日进入白羊座，也就是春分日（有些人称之为春季的一天）。