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The March equinox [7] [8] or northward equinox [9] is the equinox on the Earth when the subsolar point appears to leave the Southern Hemisphere and cross the celestial equator, heading northward as seen from Earth.
In the Northern Hemisphere, the March equinox is called the vernal or spring equinox while the September equinox is called the autumnal or fall equinox. In the Southern Hemisphere, the reverse is true. During the year, equinoxes alternate with solstices. Leap years and other factors cause the dates of both events to vary slightly. [12]
分點（英語： equinox，或稱二分點）是想像中天球赤道在天球上的位置，是每年太陽穿過天球赤道和黃道在天球上交點的天文事件 [5]，這造成地球上各地的白天和夜晚幾乎等長。
從春分点（vernal equinox）開始（黃道與赤道的交叉點之一），也稱為白羊宮的第一點。
The 2010 March equinox was March 20, 17:33:18.1 TT, which gives an interval - and a duration of the tropical year - of 365 days 5 hours 48 minutes 34.5 seconds. [28] While the Sun moves, ♈︎ moves in the opposite direction.
The March equinox on the 20 or 21 marks the astronomical beginning of spring in the Northern Hemisphere and the beginning of autumn in the Southern Hemisphere, where September is the seasonal equivalent of the Northern Hemisphere's March.
The September equinox (or southward equinox) is the moment when the Sun appears to cross the celestial equator, heading southward. Because of differences between the calendar year and the tropical year, the September equinox may occur from September
分點（英語： equinox，或稱二分點）是想像中天球赤道在天球上的位置，是每年太陽穿過天球赤道和黃道在天球上交點的天文事件，這造成地球上各地的白天和夜晚幾乎等長。
The March equinox is the moment the Sun crosses the celestial equator —an imaginary line in the sky above Earth’s equator— from south to north. This happens on March 19, 20, or 21 every year. 10 facts about the March equinox. Equinox Local Time & Date. In Roanoke Rapids, North Carolina, USA: Thursday, March 20, 2025 at 5:01 am EDT (Change location)
The March equinox – aka the vernal equinox – marks the sun’s crossing above Earth’s equator, moving from south to north. Earth’s tilt on its axis is what causes this northward shift of the...
