The vernal equinox occurs on March 20, or the 21st of each year.
Equinox Means "Equal Night"
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The March equinox, which marks the beginning of spring in
the northern hemisphere, marks The Rite of Spring. As we
welcome spring, people south of the equator are actually gearing up for cooler
temperatures of autumn.
What Happens at the Equinox?
Far from being an arbitrary indicator of the changing
seasons, March 20 (March 21 in some years) is significant for astronomical
reasons. On March 20, 2014, at precisely 12:57 P.M. EDT, the Sun will cross
directly over the Earth's equator.
Translated literally, equinox means "equal night."
Because the Sun is positioned above the equator, day and night are about equal
in length all over the world during the equinoxes. A second equinox occurs each
year on Sept. 22 or 23; in 2014, it will be on Sept. 22 at 10:29 P.M. EDT. This
date will mark the autumnal equinox in the Northern Hemisphere and the vernal
equinox in the Southern (vernal denotes "spring").
These brief but
monumental moments owe their significance to the 23.4 degree tilt of the
Earth's axis. Because of the tilt, we receive the Sun's rays most directly in
the summer. In the winter, when we are tilted away from the Sun, the rays pass
through the atmosphere at a greater slant, bringing lower temperatures. If the
Earth rotated on an axis perpendicular to the plane of the Earth's orbit around
the Sun, there would be no variation in day lengths or temperatures throughout
the year, and we would not have seasons.
Rituals and Traditions
People have recognized the vernal equinox for thousands of
years. There is no shortage of rituals and traditions surrounding the coming of
spring. Many early peoples celebrated for the basic reason that their food
supplies would soon be restored. The date is significant in Christian religion
because Resurrection day (Easter) always falls on the first Sunday after the
first full moon after the vernal equinox. It is also probably no coincidence
that early Kemet built the Great Sphinx pointing directly toward the rising Sun
on the day of the vernal equinox.
The first day of spring also marks the beginning of Nowruz,
the Persian New Year. The celebration lasts 13 days and is rooted in the
3,000-year-old tradition of Zorastrianism.
