While we say that the sun sets in the west, most times that’s not exactly the case …. [B]etween the first day of spring and the first day of autumn, the position on the horizon where the sun appears to set, known as the azimuth, actually occurs somewhat north of due west. The azimuth of the sunset slowly shifts northward until the day of the June solstice; thereafter, it reverses course and shifts back to the south. On June 21, the sun sets at an azimuth of 302 degrees, or 32 degrees north of due west. But for the setting sun to be seen from all of Manhattan’s cross streets, its azimuth must be 299 degrees, or 29 degrees north of due west.
Joe Rao, “Manhattanhenge: What It Is, and How to See It,” Scientific American, May 29, 2018