How Long Is A Decade & School Year?

How Long Is A Decade? 

First Question is How Long Is A Decade?
A decade is a ten-year period. The term comes from the ancient Greek Dekas, meaning a group of ten (via French and Latin). The term "decade" was used for ten years in 1590 in English. Decades may characterise any span of ten years, such as the lifetime of a person or applies to specific calendar-year categories.
Although a decade corresponds to a period of 10 years, it usually applies for ten years of 100 years. For example, in the 1920s, 1960s or 1980s, different cultures or behaviours are identified. The terms "century" for 100 years and "millennium" for 1,000 years both apply to long periods lasting more than a few years.

For example, "The first decade" of the life of the person starts on the day of his birth and begins at the end of his 10th birthday. The second decade of life begins with their eleventh year of existence (which is generally numbered 10) and starts on their 20th birthday at the completion of their 20th year of life, The third decade, named the twenties, begins with the 21st year of life (while 20), and finishes on its 30th birthday at the end of the 30th birthday, In relation to the ten digits of an era, the corresponding decades of life are likewise portrayed.

How Long Is A School Year?

Now Second Question Is How Long Is A School Year?

It depends on the area or country where you live. Children are about 6 - 12 months or 24 - 48 weeks in school. Therefore, the academic year is 6 - 10 months. This is inconclusive owing to so much more infrastructure, such as winter break, spring break, fall break, school vacation, and bad weather.
Some states have only a six-month span (24 weeks) because of the duration of the school day. The only 6-month period of school is from 7 to 8 o'clock, but it will be until 6 or 8 o'clock in the school, most of them from 8 am to 2 o'clock (a 6-hour day), some are "half-days," and some last for about 2 to 4 hours.
Also Read How Many Seconds & Minutes In A Day (Year)?
Read about Decade from Wikipedia
School is a year-round in some countries (and, yes, even a few districts in the US). Not that the children are in school any day of a month, throughout the year, but, in winter breaks, most children are given 2–3 weeks off. "Spring break" is one week in most American schools, 2 to 3 weeks in a year-round program. And while during the summer they must be in schools, they have more breaks than those who have 9-10 months of school.
Even the ages matter. In certain countries, children start school at the age of three, while in other countries, they start school at the average age of five (average age is five). Children go to school in some states until they are 18 years old or graduate. Some schools stop when children are sixteen or sixteen, and children only go to school in some countries until they are 13 or 14. Usually, the younger when they begin school, the younger when they graduate, but that is also not always the case.

I hope you get answers of the How Long Is A Decade? and  How Long Is A School Year?