Calendars, Traditions, and Symbols: Christmas, New Year... Who Set the Dates?

Every year, the same question arises in family conversations or on social media: why do we celebrate Christmas on December 25th? Why does the year officially end on the 31st? This seemingly simple question actually leads us on a fascinating journey through the history of calendars, religious traditions, and the symbolic choices that have shaped our understanding of time. Because Christmas and New Year do not follow the same logic.