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31 December 2100
- The 21st century is the current century in the Anno Domini or Common Era, in accordance with the Gregorian calendar. It began on 1 January 2001 and will end on 31 December 2100.
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When does the 21st century start?
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When does the 20th century start?
For those of us in the United States, December 13 is auspicious because it will be the last sequential date of the 21st century: 12/13/14. The next such numerical alignment won't roll around...
Oct 1, 2014 · a the last sum day of the21st century is december31 2043 because12 31 43 and both the month and day are as big as possible b the correct answer is365.
- How long has our calendar been around?
- B.C. or B.C.E.?
- Circa?
- Why 2012 is in the 21st Century
We are writing this on 12/26/12 or Wednesday, December 26, 2012. Traditionally understood as two-thousand and twelve years (give or take a few) after Jesus Christ is believed to have been born. But if Jesus used a calendar, it would not have been the one we use.
Our calendar is called the Gregorian calendar and was instituted by Pope Gregory XIII in 1582. There are many other calendars. Quite a few societies have used calendars linked to the years their kings ruled. And there are numerous calendars, beyond the Gregorian calendar, that are still in use today. For example, 2012 equates to 1434/35 in the Islamic calendar and 5772-73 in the Jewish calendar (both are lunar, based on the cycles of the moon).
Many people use the abbreviations B.C. and A.D. with a year (for example, A.D. 2012). B.C. refers to "Before Christ," and the initials, A.D., stand for Anno Domini, which is Latin for "In the year of our Lord." This system was devised by a monk in the year 525.
A more recent system uses B.C.E. which stands for "Before the Common Era" and C.E. for "Common Era." This newer system is now widely used as a way of expressing the same periods as B.C. and A.D., but without the Christian reference. According to this system, we count time backwards Before the Common Era (B.C.E.) and forwards in the Common Era (C.E.).
Often dates will be preceded with a "c." or a "ca." These are abbreviations of the Latin word "circa" which means around, or approximately. We use this before a date to indicate that we do not know exactly when something happened, so c. 400 B.C.E. means approximately 400 years Before the Common Era.
We live in the 21st Century, that is, the 2000s. Similarly when we say "20th Century," we are referring to the 1900s. All this because, according to the calendar we use, the 1st Century included the years 1-100 (there was no year zero), and the 2nd Century, the years 101-200. Similarly, when we say 2nd Century B.C.E. we are referring to the years 200-101 B.C.E.
Within our calendar, we also have a tendency to find portentous meaning in the millennial years, that is, in the years 1000 and more recently, 2000.
Some typical uses for the Date Calculators; Date Calculators. Duration Between Two Dates – Calculates number of days; Time and Date Duration – Calculate duration, with both date and time included; Birthday Calculator – Find when you are 1 billion seconds old; Weekday Calculator – What Day is this Date? – Find the weekday for any date
Here is the formula to work out the century corresponding to a date, extract the year from the date. Example: The date 14/07/1789 has the year 1789 Cut out the date at the last 2 digits.
- Date And Time
- A century is a measure of time corresponding to a period of 100 years.
- The calculation of centuries is carried out as follows: Subtract 1, divide the year by 100 then add 1, the integer part is the century. Example:...
- BC, the principle is reversed, the 1st century BC. JC corresponds to a period beginning on January 1 -100 and ending on December 31 -1, inclusive....
- The difficulty encountered in counting/calculating centuries is due to a common confusion about the measurement of time : Is a child born today 0 d...
- Between year 1 and year 1000 included, it is the first millennium. Between the year 1001 and the year 2000 is the second millennium. Between the ye...
- Repeat the calculation used for the century but with the last 3 digits and compare them between 001 and 999 .
- Take the value in years and divide by 100. Example: For 250 years, do 250/100 = 2.5 so 250 years is equal to 2.5 centuries
- Humanity is currently in the 21th century which began on January 1, 2001 and will end on December 31, 2100.
Yep, that's what's coming next: the 22nd century. Its years will all* start with 21, proceeding up to the distant 2199. And as we all know, we're currently in the 21st century, but the years start with 20. And in the 20th century, they all started with 19, and in the 19th, with 18, and so on.
February 8: The Algerian Civil War ends. February 27 – March 1: Riots and mass killings in the Indian state of Gujarat leave 1,044 dead. March 14: SpaceX is founded by Elon Musk. April 11 - 13: 2002 Venezuelan coup d'état attempt fails to overthrow president Hugo Chavez. May 20: East Timor gains independence.
