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In Europe, this milestone has already passed, because folks there prefer to format dates starting with the day. For Europeans, 11 December 2013 (11/12/13) was the last sequential date of the century.
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The 21st Century Started in 2001. In 1999, the world was preparing for the New Year's party of a lifetime. The year number in the Gregorian calendar was about to tick over to 2000, supposedly ushering in not only the 21st century but also the 3rd millennium CE. However, the party was held one year too early—it should have been on January 1, 2001.
- 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.
People also ask
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Is January 1st 2002 the first'sum-day' of the new century?
Sum-day Soon. Math Math brain teasers require computations to solve. Some people believe that January 1, 2000 is the first day of the 21st century. Other people believe that the honor belongs to January 1, 2001. But everyone should agree that January 1, 2002 is the first "sum-day" of the new century- when you write out that date in standard ...
Aug 30, 2023 · The last day of the 21st century is Friday, December 31, 2100. ... What is the last sum-day is the 21st century? Updated: 8/30/2023. Wiki User. ∙ 11y ago. Study now. See answers (2)
This is a timeline of pure and applied mathematics history.It is divided here into three stages, corresponding to stages in the development of mathematical notation: a "rhetorical" stage in which calculations are described purely by words, a "syncopated" stage in which quantities and common algebraic operations are beginning to be represented by symbolic abbreviations, and finally a "symbolic ...
