The way we handle the calendar allows us to understand the great influence that Christianity has had on culture, especially in the West, that is, Europe and America. Although there are other calendars (such as the Chinese and Jewish ones), the official one is the Western calendar. This cultural influence is due to the fact that Christianity has been practically the only religion in Europe, as well as in many countries of the Mediterranean and the Middle East, from at least the 4th century to the present. In the 15th century, it arrived with the conquerors in America
In turn, the Church exerted great political influence. Therefore, kings, armies and peoples declared themselves Christians. Its international influence, however, diminished from the 18th century when laicism was adopted in many countries.
