![]() There are some strange tenors in the FX market. These days with a very efficient market, every "month" and "year" tenor is a Fixed Tenor and broken dates are only those dates that do not fall on one of those dates. In the old days only 1W, 1M, 2M, 3M, 6M, 9M, 1Y were considered fixed tenors, anything else was called Broken Periods/Tenors. These three periods (tenors) are part of what it is called Fixed Tenors. ![]() They imply a period of time between Spot and a date in 1M, 1W or 1Y time. One Month (1M), One Week (1W) or One Year (1Y) are not dates. ![]() This means that on that date you usually exchange currencies. Spot is, conventionally for most currencies, the Spot Date. And I thought of sharing with the rest of the community. He's got his first Junior BA interview this morning. I got a limited amount of time as someone asked for it not too long ago. Let's see quickly, what kind of Date convention I can come up with in the next few minutes. The Third Millennium.I am sure that most of you are aware of conventions, however, during my training sessions I find that some participants find difficult grasping the meaning of all dates conventions and Tenors and Dates are often mixed up.The New Millennium - Royal Greenwich Observatory.The opinions expressed here are those of the author and he assumes full responsibility for their accuracy.įor more information on the subject of dating, see: Historians should take care to note the numerical difference of one year between "BCE" dates and astronomical dates.Īstronomical date numbering was developed for astronomical calculations and is used extensively throughout this web site. In general, any given year "x BCE" becomes "-(x-1)" in the astronomical year numbering system. The astronomical year 0 corresponds to the year 1 BCE, while the astronomical year -1 corresponds to 2 BCE. Thus, the astronomical date for 2000 CE is simply +2000 or 2000. It includes the year "0" and eliminates the need for any prefixes or suffixes by attributing the arithmetic sign to the date. The "astronomical" dating system refers to an alternative method of numbering years. However, Exiguus' dating system still lacks a "0" year which makes calendrical calculations awkward. These secular terms are both used as suffixes making them better suited to computer generated tables.Ĭonsequently, the NASA Eclipse Home Page adopts the "BCE/CE" dating convention whenever the terminology is required. In recent years, some historical scholars have advocated the use of the religiously neutral abbreviations BCE (for "Before Common Era") to substitute for "BC,"Īnd "CE" (for "Common Era") to replace "AD." This is inconvenient when generating computerized lists because extra columns must be reserved for both prefixes and suffixes. Perhaps the most unfortunately characteristic of this convention is that "BC" is a suffix (used after the year) while "AD" is a prefix (used before the year). In spite of these deficiencies, the dating system devised by Exiguus is now too deeply ensconced in the Western world to easily change. Thus, the year 1 BC was followed by the year AD 1.įurthermore, modern scholars believe Christ's birth was actually four years earlier than Exiguus thought. In sixth century Europe, the concept of "zero" was still unknown. The convention is based on Exiguus' determination of the year in which Jesus Christ was born.įor instance, in the date AD 2001, the prefix "AD" stands for "Anno Domini" which is Latin for "the year of our Lord." Similarly, in the date 500 BC, the suffix "BC" stands for "Before Christ." The western-style year dating convention commonly used in many parts of the world was created by the monk Dionysius Exiguus in or about the year AD 532.
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