Time and eternity – the notion that affect many philosophers of antiquity and modernity. Time and eternity – the opposite of having a common 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 is occupied and continues to occupy 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 shift and night long, and so on Moon – a natural "Calendar", which allows you reckon quite long periods of time. This "calendar" is used in many ethnic cultures, even today. On the lunar calendar was based Menotonov calendar, calendar pontiffs However, the ancient 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 real change since the year holidays ceased to correspond to the time of sowing or harvest. As a result, many calendar reform undertaken in the history of human existence, is now installed in 365 calendar 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 for 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." Constant dependence on time causes a person to always have handy clock and calendar.
Today, however, often performs the calendar is not only utilitarian but also 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, handheld, flip, calendars, posters, souvenir Do not forget about electronic calendars, which have penetrated into human life with the advent of computers, and various kinds of diaries, which allow not only to trace the course of time, but plans for the future. Such diversity calendar due to the difference of conditions in which the calendars are used, as well as the functions they perform. If, in itself better to have a small pocket calendar, which if necessary you can get from purse, the office is better to have a big quarterly or wall calendar that is convenient to keep track of dates. But whatever it was, the calendar – a necessary subject in everyday life of any person.