The study traces how early societies measured time through observation of the sun, moon, stars and seasonal cycles, identifying common solutions such as lunar months, lunisolar corrections and seasonal divisions. Drawing on ethnographic and historical evidence, it compares regional practices, festival-linked calendars and the influence of ritual and religion on dating. It examines astronomical markers used to regulate years, the naming and counting of months, patterns of cultural borrowing and local variation, and it acknowledges evidential limits and methodological challenges while indicating how primitive systems shaped later calendrical forms.