The jubilee always becomes a grandiose celebration,Whether it's the anniversary of a person, city or organization. If you want to celebrate, you can not only traditional "round dates" - 25, 50, 100 years - but also more exotic jubilees, for example 10,000 hours.
To do this, you only need to calculate the number of hours in a year.
The arithmetical calculations necessary to determine the number of hours that develop in a year are not difficult.
Calculating the number of hours
Quantitative ratio of units of measurementTime to someone may not seem quite comfortable, because they are not a multiple of ten. This is explained by the fact that the European civilization inherited them from Ancient Babylon, where there was not a decimal number system, familiar to the modern person, but a twelve-digit one, so the ratio of time units is multiples of 12. The number of hours in 24 is not an exception.
To get the number of hours in a year, you need toJust multiply 24 by the number of days that make up the year. In the Gregorian calendar, according to which the modern civilization lives, alternate non-leap years and leap years. In the first case, the year contains 365 days, and in the second - 366. The multiplication of these numbers by 24 gives 8760 and 8784, respectively.
So, in a leap year, 8784 hours, and in8760. If someone has a desire to celebrate the 10,000th anniversary of an event, you need to count one year from his date and add 51 days, if the year is not leap year, or 50 days, if leap year. For clarification, we should add a few more hours, but hardly anyone will strive for absolute accuracy.
Year from the point of view of astronomy
The duration of the year established by the calendarTo a certain extent conditional. It is convenient for a person to start a new year with new days. In reality, however, the period of revolution of the Earth around the Sun, which is considered to be the year, does not coincide with the earth's day.
From the point of view of the observer onThe day of the vernal equinox corresponds to the earth, the beginning and the completion of the Earth's revolution around the Sun. Astronomers call this period a tropical year. During this time, the longitude on which the Sun can be observed increases by 360 degrees, passing a full circle.
A tropical year that takes into accountAstronomers, somewhat longer than the calendar. That is why the calendar had to introduce leap years. Its duration is 365 days 5 hours 48 minutes and 46 seconds. Therefore, to the earlier 8784 hours, it is necessary to add another 5 hours and almost 49 minutes. In this case, the duration of the astronomical year is approximately 8789 hours 49 minutes, and if rounded, then 8790 hours.