It’s Memorial Day weekend here in the United States. (Yay! Monday is a holiday, and the unofficial start of summer). The New York Times pointed out to New Yorkers that two days of ‘Manhattanhenge‘ are coming up : when the setting sun aligns perfectly with the numbered streets that run east and west on Manhattan’s city grid, bathing traffic and skyscrapers in its warm red light. This year’s displays will occur at about 8:12 p.m. this Sunday and Monday, and again on July 11 and 12.