Time and Eternity – the concept that affected many philosophers of antiquity and modernity. Time and Eternity – is the opposite, having a single nature. Time – this is a river that flows continuously, not stopping at second, and eternity – the sea, in which every river carries its waters. On the essence and nature of the time people began to wonder at the dawn of time. This concept took hold and continues to the minds of philosophers. Time is irreversible, but none However, throughout its history, people trying to keep time, "stop a moment" …
or at least follow up his change. Initially, people perceived over time as a cyclical process of change and to night long, and so on Moon – a natural "calendar", which allows you to count very long periods of time. This "calendar" is used in many ethnic cultures, even today. On the lunar calendar was based Menotonov calendar, a calendar of the ancient pontiffs … However, the inventors of calendars, priests and astrologers, lacked knowledge of astronomy, with the result that there were flaws in the systems of chronology and calendars through greater or lesser period of time ceased to correspond to an actual change in the long years, holidays, ceased to be the time of sowing or harvest. As a result, many of calendar reform undertaken in the history of human existence, now installed in the calendar of 365 days, and every 4 years is a leap year. The accuracy of the calendar – a prerequisite of the existence of modern man.
Date and time – necessary conditions of business life. Indeed, it would be to put it mildly, strange to hear from a business person, that, for example, delivery of materials for production will take place "after 5 Moons." Continuous dependence on time causes a person to always have on hand a clock and calendar. Today, however, often performs the calendar not only utilitarian, but also the decorative features (especially the large wall calendars), and manufacturing calendars – this is a separate industry in which there are many different suggestions: wall calendars, desktop, pocket, flip, calendars, posters, souvenir … Do not forget about electronic calendars, which have penetrated into human life with the advent of computers, and all kinds of agendas, which can not only track the passage of time, but plans for the future. Such diversity calendar due to differences in conditions in which the calendars are used, as well as the functions they perform. If you currently have better small pocket calendar, which if necessary you can get from purse in the office better have a big wall calendar quarter or on which date is convenient to monitor. But whatever it was, a calendar – a necessary item in everyday life of any person.