Explanation:
Today, if it is clear, Manhattan will flood dramatically with sunlight just as
the Sun sets precisely on the centerline of every street. Usually, the tall
buildings that line the gridded streets of New York City's tallest borough will
hide the setting Sun. This effect makes Manhattan a type of modern Stonehenge,
although only aligned to about 30 degrees east of north. Were Manhattan's road
grid perfectly aligned to east and west, today's effect would occur on the
Vernal and Autumnal Equinox, March 21 and September 21, the only two days that
the Sun rises and sets due east and west. If today's sunset is hidden by clouds
do not despair -- the same thing happens every May 28 and July 12. On none of
these occasions, however, should you ever look directly at the Sun.
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