Why did the Exodus from Egypt change the way the Jewish people count the months of the year?

This source-based Hagut Yosef essay explores the question: Why did the Exodus from Egypt change the way the Jewish people count the months of the year? The canonical Hebrew article develops the theme through Torah sources and reflection on human life. This localized discovery layer preserves the source’s meaning and identity and does not add new halakhic, historical, psychological, medical, legal, political, scientific, or empirical claims beyond the Hebrew source.