

How to Determine the Start and End of a Century in Mathematics
A century is a 100-year era. centuries are counted sequentially. The term century is derived from the Latin word centum, which means "one hundred." Century is abbreviated as “c”.
A centenary is a one-hundredth anniversary, or celebration of one’s 100 years, usually of an occurrence that occurred one hundred years ago.
Starting and End of the Century:
While a century may refer to any 100-year era, there are two schools of thought on the existence of traditional centuries. One is founded on rigid construction, while the other is founded on common understanding.
The first century AD, according to strict construction, started with 1 AD and ended with 100 AD, with the same trend going onward. The n-th century begins with the year that ends in "01" and ends with the year that ends in "00" in this model. As a result, a century can only have one year, the centennial year, which begins with the number of the century. For example, In 19 century 1900 is the last year.
Years are grouped in centuries based on their shared digits, according to traditional belief and practice. The 'n' -th century, according to this model, begins with the year ending in "00" and ends with the year ending in "99." The twentieth century, for example, will be described as the period from 1900 to 1999, inclusive. In the century of 100 years, there was also the occurrence of the leap year. The difference between a year and a leap year is only 1 day. In Leap year, there are 366 days and in a normal year, there are 365 days. And leap years always occur after every 4 years. And this difference of 1 day makes the difference in the number of days in the century.
The 1st century is 1 year from 100 years.
The 2nd century is 101 years from 200 years ago.
……..
And goes on
21st Century
Currently, We are living in the 21st century. And the 21st century is from 2001 to 2100.
We are living in 2021.
We are living in the 21st century, we have crossed 20 centuries each of 100 years. In the 21st century, there are 36503 days and the number of days in the year is due to the calendar perspective.
Start of the Century:
The start of the century is referred to as the initial periods of the century. As the name suggests, start is known as the initial period. Therefore the start of 21 century is referred to as the year 2001 with which the 21st century started and the 20th century marked its end. Therefore with the start of the new century marked as the end of the previous century.
A Quarter of the Century:
The quarter is referred to as “25”. Therefore, a quarter of a century is referred to as the 25 years era. As the century is of 100 years. 25 years of 100 years are referred to as the century of that era.
End of the Century:
The end of the century is referred to as the completion of its 100 years. The end of the 21st century is referred to as the completion of the year 2100. After the completion of 2100, the 22nd century gets started.
Century Fox:
News Corporation's legal successor, 21st Century Fox, specialized in the film and television industries. Before The Walt Disney Company bought it in 2019, it was the fourth-largest media conglomerate in the United States. Murdoch's print interest and other media properties in Australia are held by the other group, which is now known as News Corporation (both owned by him and his family via a family trust with 39 percent interest in each). 21st Century Fox shareholders decided to sell the bulk of the company's properties to Disney for $71.3 billion on July 27, 2018. The sale included 20th Century Fox, FX Networks, and National Geographic Partners, among other entertainment properties held by 21CF. The rest, mainly the Fox and My Network TV networks, as well as Fox's national broadcasting, television stations, news, and sports operations, were spun off into a new corporation, Fox Broadcasting.
FAQs on Century: Meaning and Importance in Maths
1. Are we now 21st or 22nd century?
We are currently in the 21st century, which began in the year 2001 and will end in 2100. Each century covers a hundred-year span, with the 21st century representing the years from 2001 to 2100 based on our Gregorian calendar.
2. What is a century?
Century means a period of 100 years. It is used to mark significant blocks of time in history. For example, the 20th century includes the years 1901 to 2000, while the 21st century started with 2001 and ends in 2100.
3. Why do we say 21st century instead of 20th?
We say 21st century because centuries are numbered by their position, not the years themselves. The years 2001–2100 are called the 21st century, counting one century after the first 100 years ($1 \to 100$ is the 1st century, and so on).
4. What is 50 years called in a century?
A period of 50 years is called half a century. In any century, half of the total years make up fifty years, also called a semi-centennial. For example, from 1901–1950 is half of the 20th century's total span.
5. How is a century calculated?
A century is calculated by counting 100 years from the starting point. For histoical periods, the 19th century covers
- 1801 to 1900
- 1901 to 2000
6. Why does the century number always seem one ahead of the year?
The century number is one ahead because the first century started at year 1, not year 0. The years 1–100 make up the 1st century, 101–200 the 2nd, and so on. This makes the 2000s part of the 21st century.
7. What is the difference between a century and a decade?
A century lasts 100 years, while a decade is just 10 years. Each century contains exactly ten decades. Both are time units used to describe periods in history, but a century covers much more time than a decade.
8. What is a millennium compared to a century?
Millennium means 1,000 years, while a century is only 100 years. So, ten centuries make up one millennium. For example, the years 2001–3000 form a millennium and cover ten whole centuries.
9. When did the 21st century start and end?
The 21st century started on January 1, 2001 and will end on December 31, 2100. Each century uses full calendar years, so the 21st century includes the entire 100-year period from 2001 to 2100.
10. How do you write centuries in numbers and words?
A century can be written using ordinal numbers, like 20th century or 21st century. It can also be written in Roman numerals, such as XXth century for the 20th century or XXI century for the 21st century.

















