Why was a lunar calender needed?

A lunar calendar was needed primarily for agricultural and cultural purposes, as it aligns more closely with the natural cycles of the moon, which influence phenomena like tides and the changing of seasons. Ancient societies relied on the lunar phases to determine the timing of planting and harvesting crops, as well as scheduling religious festivals and rituals. Additionally, lunar calendars provided a way to organize time in a manner that was observable and consistent with the rhythms of nature, facilitating communal activities and social cohesion.