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The vernal equinox, or spring equinox 2012, occurred this morning, March 20, 2012, at 1:14 a.m. EDT. The equinox is the exact moment when the sun appears directly over the equator. The vernal equinox leads into the official first day of spring 2012.
An equinox represents one of two times per year that the day and night are approximately of equal length; from here on, we can welcome longer days and shorter nights until the next equinox, the autumnal equinox on September 22, 2012.
Now that spring has sprung, we can expect warming temperatures, blooming flowers, and, unfortunately for some poor souls, the onslaught of allergies.
