https://www.astronomy.com/today-in-the-history-of-astronomy/june-21-2500-b-c-e-summering-at-stonehenge/
June 21, ca. 2500 B.C.E.: Summering at Stonehenge
Jun 21, 2025 - Today in the history of astronomy, celebrations at Stonehenge mark the summer solstice.
2500 b cjune 21casummeringstonehenge