From the beginning, humans marked the seasons with megalithic monuments which guided their annual journey through time. Today we find remnants of those astronomical observatories as clues to ancient civilizations ... allowing us to wonder who guided their original design. In 2013, we continue to build stone monuments above, below, and on the surface of the planet as if codes written in time. Sometimes those buildings get destroyed as a reminder that life is about ongoing change and nothing is meant to last forever.

Manhattanhenge occurs when the setting sun aligns with
the east-west streets of the main street grid in Manhattan.

Satellite view of Manhattan centered on the
intersection of Park Avenue and 34th Street

During Manhattanhenge, an observer on one of the gridded east-west streets will see the sun setting over New Jersey directly opposite, from the street, along its centerline. The dates of Manhattanhenge usually occur around May 28 and July 12 or July 13 - spaced evenly around the summer solstice. As with the solstices and equinoxes, the dates vary somewhat from year to year. Read more ...

Manhattanhenge -- July 11, 2016

Manhattanhenge: A New York City Sunset   NASA - July 6, 2014

This coming Saturday, if it is clear, well placed New Yorkers can go outside at sunset and watch their city act like a modern version of Stonehenge. Manhattan's streets will flood dramatically with sunlight just as the Sun sets precisely at each street's western end. 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. Pictured above in this horizontally stretched image, the Sun sets down 34th Street as viewed from Park Avenue. If Saturday's sunset is hidden by clouds do not despair -- the same thing happens twice each year: in late May and mid July. On none of these occasions, however, should you ever look directly at the Sun.

The name Manhattanhenge is derived from Stonehenge when the sun aligns
with the stones on the summer and winter solstices.