Decades of a month are a third of a month, or a ten-day period of time

We are used to the fact that time on Earth is measured by centuries, years, months and days. Each time interval has its own notation. For example, a century, a day, half a year. Here we consider such a notion as the "decade", it is not used as often as some other terms, but it is also necessary to know its meaning.

People who have first encountered this definition often ask themselves: a decade of a month is how many days? In this article we will consider this topic in more detail.

Origin of the word

This term comes from the Greek words dekas, which means "ten". Strangely enough, but in many other languages, which are not related to the Greek, there are same-root words with the same meaning. On this score, there are certain assumptions, the main of which is that a word like "ten" has come to us since the times when the common Indo-European language was distributed.

Proceeding from the etymology, the words "decade" and "ten" mean keeping the account, which is a multiple of the gums - ten fingers on the hands. Earlier, in some peoples, the week was equal to ten days, that is, a decade, while others - five days, as, for example, in Ancient Rus. For the first time this unit of time was applied when using the French republican calendar.

In ancient Japan, the division of the month into decades was widely spread, which was then called the word "Jun". This temporary dimension was introduced later in post-revolutionary France, and the period of ten days was the smallest indivisible unit of time.

From France this concept falls into the spoken language of many peoples of European countries and becomes a measure of time, which divides the month into three parts.

What does the term "decade" mean?

A decade is a kind of group that contains ten units. This term is used mainly in relation to the month.

Proceeding from the generally accepted definition, the ten days of a month are units of time, each of which is equal to ten days. At present, this definition is mainly used not in everyday life, but, for example, in the economic field or in statistics. It should also be noted that it is also used in astrology.

Other notations

To all other things, a decade sometimes means a certain event, say, "a decade of English culture at a university" or "a decade of literature and art of the peoples of Russia." In this case, ten days of the month are certain activities that last for ten days, or else a third of a month. Here this word is used in the context of a certain holiday or an event of social significance.

Based on the interpretation given in Ushakov's dictionary, the ten days of the month are ten-day periods that replaced the week in the modern Soviet calendar. The time span of ten days, which is used in the schedule of training sessions. It is also a period applied in the field of statistics and economics. The English word decade, for example, means not ten days, but a period of ten years. This designation is used in England itself and in a number of other countries.

How many years in a decade and how many decades in a month?

In the month of 30 (31) a day and, thus, it has three decades.

If we take into account that the ten days of the month are intervals equal to ten days, then in the year (365 days) of such decades 36.5 are obtained, 36 times roundly. In Ancient Rus, in order to remove five or six extra days, the svyatok system was used Thus, in the year exactly 36 decades were obtained, each of which is equal to ten days.

Decades by the calendar month numbers

Accordingly, the first decade lasts from the beginning of the month, that is from the first date to the tenth, the second decade of the month is the interval from 11 to 20, and the next ten days from the 21st to the end of the month.

Decades in the form in which they should be, is only in a number of those months in which thirty days, namely, they include April, June, September and November. In the remaining months, the third decade of the month is an interval that contains one extra day. The exception is the month of February, in which the last decade is less than ten days and is eight or nine days, depending on whether a leap year or not.

Zodiacal Decades

Like the calendar month, which is divided into decades, each sign of the Zodiac that owns a particular time interval is also divided into three parts, but this division, applicable to the usual month, should not be confused.

At the heart of the division is not ten days, but ten degrees. The astrological decade most often, like the calendar decade, contains ten days, but still its time boundaries can shift in one direction or another, that is, for example, for a couple of days more or less.

The astrological year, like the calendar year, is divided into 12 parts, only each of them in this case is not a month, but a certain sign of the Zodiac. It should be noted that the decades of the astrological month are of great importance, because each of them is controlled by a certain planet, which, in turn, affects the sign of the Zodiac.

Thus, it is possible to trace a certain mystical meaning of the number ten (decade), because the number ten is considered from the time of the Divine number.