Calendar – is an essential attribute of modern life, which can be easily found in any home or office. Since ancient times the calendar has helped people fix the date, time periods measured, organized, and organize their livelihoods. At the heart of any calendar lay periodic change of motion of celestial bodies. (As opposed to Mark Fields). But in different periods of history different cultures differently interpreted the principles that should underlie the creation calendar, hence the huge number of calendars, as well as numerous disputes that last and at the moment. In Wikipedia you can find the following definition of the calendar. Calendarium – this is a book debt, calculated on a Sun carried a special day – Kalends, which literally translates as the beginning of the month. Ancient peoples used their methods of fixation of historical events, for example, the Romans were counting from the founding of Rome, and ancient Egyptian chronology began with the reign of each new dynasty. Translation from one system to another chronology complicated by the fact that these systems have unequal length, as well as a different date of beginning.
What calendars have existed in antiquity and which ones have the progenitors of the modern calendar? Let's look at some of them. 1. The ancient Greek calendar. Was the moon, and consisted of 354 days. The main drawback this calendar was that he occasionally clashed with the solar year at 11.25 days. For this reason, every eight years to the year had to add 90 days, divided into three equal months.