astronomical calendars

Astronomical calendars are systems that organize days based on celestial events, such as the Earth's orbit around the Sun, the Moon's phases, and the positions of planets. They help track seasonal changes, lunar cycles, and solar years, which are essential for agriculture, navigation, and cultural traditions. Modern calendars, like the Gregorian calendar, incorporate astronomical observations to keep fixed dates aligned with seasons and lunar phases, ensuring accuracy over long periods. Overall, astronomical calendars reflect our understanding of celestial motions and are tools for harmonizing human activities with the natural cycles of the universe.