There are two times a year when the sun aligns with the midtown street grid in Manhattan, known as Manhattanhenge, and the creator of nychenge.com has built an interface to explore where mini-henges occur across all neighborhoods in NYC. This visualization uses CartoDB 2.1 to display the phenomenon and provides information on how to find your own favorite henge date center on a map. The project aims to use this technology for other cities, such as San Francisco and Madrid, and includes additional features like finding events including one's street. The data used is Open Street Maps, and the alignment of the sun was calculated using the open source SunCalc library. The code is available on GitHub, making it an open-source project.