Hazaribag Megalithic Site: Ancient Astronomical Calendar Aligned with Sun Events

A V-shaped megalithic site in Hazaribag, discovered by Subhashis Das, is a significant archaeo-astronomical center. Researchers are drawn to its precise alignment with solar events, including the spring equinox, where the rising sun passes through a stone gap. These ancient structures, known as birbiri among tribal communities, served as calendars, marking seasons and time through solar observation.