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The March equinox is known as the vernal equinox (spring equinox) in the Northern Hemisphere and as the autumnal equinox (autumn equinox or fall equinox) in the Southern Hemisphere. [8] [7] [10] On the Gregorian calendar , the northward equinox can occur as early as 19 March or as late as 21 March at 0° longitude .
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 the Assyrian calendar, Hindu, and the Persian or Iranian calendars, while the autumnal equinox
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Right ascension and declination as seen on the inside of the celestial sphere. The primary direction of the system is the March equinox, the ascending node of the ecliptic (red) on the celestial equator (blue). Right ascension is measured eastward up to 24 h along the celestial equator from the primary 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.
Spring equinox or vernal equinox or variations may refer to: March equinox, the spring equinox in the Northern Hemisphere. September equinox, the spring equinox in the Southern Hemisphere.
Date. March equinox. Frequency. Annual. Vernal Equinox Day (春分の日, Shunbun no Hi) is a public holiday in Japan that occurs on the date of the Northward equinox in Japan Standard Time (the vernal equinox can occur on different dates in different time-zones), usually March 20 or 21.
This article is about the celestial coordinate system. For the moment when the Sun is positioned directly over Earth's equator, see Equinox. In astronomy, an equinox is either of two places on the celestial sphere at which the ecliptic intersects the celestial equator.
