Concept in Definition ABC

One year is the period of time it takes the earth to make one complete revolution around the sun.Although the year is not only reduced to the time it takes the planet earth to rotate, but the phenomenon also extends to the other planets.

One year is composed of 12 months, some like April, June, September and November of 30 days and others like December, January, March, May, July, August and October of 31 days and February, the most “rebellious”, which every four years (leap year) adds one more day to its traditional number 28.

exist various years according to the reference you decide to use for decide its duration.
The Sidereal year, For example, it is the one that more accurately measures the duration of a year, that is why it is the most used by astronomers and it is the time that elapses between two consecutive steps of the earth through the same point of its orbit, takes the stars as a reference and its duration is 365 days, 6 hours, 9 minutes and 9.76 seconds.

On the other hand, we find the tropic year which takes as a reference the vernal equinox and is the time that passes between two successive steps of the Sun through the middle equinox, so that it is understood, it would be one spring the following spring. The duration is 365 days.

And finally, the year calendarwhich are the numbers of complete days considered as a year and which has a high impact in civil and religious matters.

In the West, for example and at the request of the resolution taken by Pope Gregory XIII in the year 1582, January 1 is the day on which the year changes and for this reason, the object of the traditional celebration that the western world celebrates from the last hours of the old year, on December 31, extending the celebration until a few hours after the same 1 of January.

Is almost law on this date, the meeting of the family or, failing that, of friends who come together for dinner and wait for the arrival of the new year together.