# Why are we in the 21st century and not the 20th?

Why are we in the 21st century and not the 20th? When you take into account the fact that years beginning with “20” are referred to as the “21st Century” (and similarly, years beginning with “19” were the “20th Century”), the method in which we express ages, whether it be years or the ages of individuals, may often seem peculiar.

On the other hand, there is a rational justification for this: when it comes to age and the amount of time that has gone, we only assign numbers once the whole of the time period has passed.

## How ages are calculated using years?

When we remark about how old someone or something is, we are referring to the same underlying idea. A kid is considered to be in their first year up until the time that they turn 1, much like the first century; however, we do not consider a child to be 1 until after that year has passed.

For instance, if you are 15 years old, this means that you have already lived 15 years of your life. At the same time, as you turn 15, you are technically moving into your 16th year of life. A person’s age is often referred to in relation to the time period that it is now finishing, although the age itself is denoted by a number that indicates the amount of time that has already elapsed.

It is important to keep in mind that this is not something that can be generalised to apply to all labels of time. It is correct to say this when referring to a person’s age; yet, if you are discussing anything like a class or a timetable, you will discover that the time period that is being covered is referred to as a name.

During your time in college, you may hear people refer to themselves as being in Year 1, Year 2, or Year 3, for example, which indicates that year is the one they are presently finishing.

Be mindful, though, that when we speak about centuries and give numbers to ages, the label that we use to describe a continuous period of time is not the same as the number that we assign to it! Please have a look at this post as well if you want to learn more about the many ways that dates may be written.

## How long has it been since we’ve been using this calendar?

This is being written on Wednesday, December 26, 2012, which is also known as 12/26/12. According to common belief, this day corresponds to about two thousand and twelve years (give or take a few) after it is thought that Jesus Christ was born. But the calendar that Jesus used would have been quite different from the one we use now.

Our calendar is known as the Gregorian calendar, and Pope Gregory XIII is credited with establishing it in the year 1582. There are also a great number of additional calendars.

There have been quite a few different cultures that have employed calendars that were connected to the years that their rulers reigned. In addition, the Gregorian calendar is only one of several calendars that are still in use today; there are many more.

For instance, the year 2012 corresponds to the years 1434 and 1435 in the Islamic calendar and to the years 5772 and 5773 in the Jewish calendar (both are lunar, based on the cycles of the moon).

## Which comes first, B.C. or B.C.E.?

B.C. and A.D. are two acronyms that are often used in conjunction with years (for example, A.D. 2012). The abbreviation “B.C.” stands for “Before Christ,” while the letters “A.D.” stand for “Anno Domini,” which translates to “In the year of our Lord” in Latin. In the year 525, a monk came up with this method of organisation.

A more modern method use the abbreviations B.C.E. and C.E., which stand for “Before the Common Era” and “Common Era,” respectively.

This more recent approach is now frequently used as a means to indicate the same eras as B.C. and A.D., but it does so without making any reference to Christianity. According to this method, we start counting the passage of time from Before the Common Era (C.E.) and work our way forwards to the present day in the Common Era (C.E.).

## Circa?

Dates will often have a “c.” or a “ca.” written before them. These phrases are shortened forms of the Latin word “circa,” which literally translates to “about” or “roughly.”

When we don’t know the precise year that something happened, we put this before the date to indicate that. For example, “c. 400 B.C.E.” signifies that the event occurred roughly 400 years before the Common Era.

## Why are we in the 21st century and not the 20th?

Today is the first year of the 21st century, often known as the year 2000. In a similar vein, when we speak to the “20th Century,” we are really talking about the 1900s.

All of this is because, according to the calendar that we use, the years 1–100 comprise the 1st century, whereas the years 101–200 comprise the 2nd century. There was no year zero during the 1st century. In a similar vein, when we talk about the 2nd Century BCE, we are talking to the time period between 200 and 101 BCE.

Within the framework of our calendar, we have a propensity to look for ominous significance in the millennial years, namely in the year 1000 and, more recently, in the year 2000.

## F.A.Q Why are we in the 21st century and not the 20th:

### Why is this century referred to as the 21st instead of the 20th?

Today is the first year of the 21st century, often known as the year 2000. In a similar vein, when we speak to the “20th Century,” we are really talking about the 1900s.

All of this is because, according to the calendar that we use, the years 1–100 comprise the 1st century, whereas the years 101–200 comprise the 2nd century. There was no year zero during the 1st century. In a same vein, when we talk of the second century B.C.E.

### Which century are we living in—the 20th or the 21st?

And as we are all aware, we are now well into the 21st century, even though the years begin with the number 20. And in the 20th century, they all began with the number 19, whereas in the 19th century, they began with the number 18, and so on.

### Why are we not still in the 20th century in the year 2000?

It is not accurate to call the era that began in 1900 and ended in 1999 the 20th century since the 20th century started on January 1, 1901 and will finish on December 31, 2000. Any time that spans 100 years may be considered a century. After then, the start of the third millennium of our age will finally occur.

### What are some of the ways in which the 21st century is distinct from the 20th century?

The 21st century will officially begin on January 1, 2001, marking the conclusion of the 20th century, which spans the years 1901 to 2000. The first day of the 21st century was January 1, 2001.

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