An anniversary is the date on which an event took place or an institution was founded in a previous year, and may also refer to the commemoration or celebration of that event. The word was first used for Catholic feasts to commemorate saints .
47-666: The Oregon Centennial was the 100th anniversary of the statehood of the U.S. state of Oregon . The day of the anniversary was February 14, 1959, but centennial events took place throughout the year. Festivities were held all over the state, with the major attractions at the Oregon Centennial Exposition and International Trade Fair , located at the Expo Center in Portland's Kenton neighborhood, which took place from June 10 to September 17, 1959. The chief dramatic event of
94-400: A duodecimal rather than a decimal system for fractions , as the divisibility of twelve (12 = 2 × 3) makes it easier to handle the common fractions of 1 ⁄ 3 and 1 ⁄ 4 than does a system based on ten (10 = 2 × 5) . Notation for fractions other than 1 ⁄ 2 is mainly found on surviving Roman coins , many of which had values that were duodecimal fractions of
141-456: A box or circle. Thus, 500 was like a Ɔ superimposed on a ⋌ or ⊢ , making it look like Þ . It became D or Ð by the time of Augustus, under the graphic influence of the letter D . It was later identified as the letter D ; an alternative symbol for "thousand" was a CIↃ , and half of a thousand or "five hundred" is the right half of the symbol, IↃ , and this may have been converted into D . The notation for 1000
188-524: A huge statue of Paul Bunyan in Kenton. Many communities had to raise money to finance their celebration plans. One method used to raise funds was the sale of Oregon Centennial Tokens . Many private companies also created Centennial items for sale. In 2009, the state celebrated the Oregon Sesquicentennial , also known as "Oregon 150". This Oregon -volunteer or nonprofit organization related article
235-552: A largely "classical" notation has gained popularity among some, while variant forms are used by some modern writers as seeking more "flexibility". Roman numerals may be considered legally binding expressions of a number, as in U.S. Copyright law (where an "incorrect" or ambiguous numeral may invalidate a copyright claim or affect the termination date of the copyright period). The following table displays how Roman numerals are usually written: The numerals for 4 ( IV ) and 9 ( IX ) are written using subtractive notation , where
282-587: A practice that goes back to very early clocks such as the Wells Cathedral clock of the late 14th century. However, this is far from universal: for example, the clock on the Palace of Westminster tower (commonly known as Big Ben ) uses a subtractive IV for 4 o'clock. Several monumental inscriptions created in the early 20th century use variant forms for "1900" (usually written MCM ). These vary from MDCCCCX for 1910 as seen on Admiralty Arch , London, to
329-415: A quarter" ( de means "from"; quadrans means "quarter"). Thus for the example of 175 years, the term is a quarter century less than the next whole (bi)century or 175 = (−25 + 200). In Latin, it seems that this rule did not apply precisely for 1 + 1 ⁄ 2 . While secundus is Latin for "second", and bis for "twice", these terms are not used such as in sesqui-secundus. Instead sesqui (or ses )
376-539: A table of epacts , all written in Roman numerals. The use of N to indicate "none" long survived in the historic apothecaries' system of measurement: used well into the 20th century to designate quantities in pharmaceutical prescriptions. In later times, the Arabic numeral "0" has been used as a zero to open enumerations with Roman numbers. Examples include the 24-hour Shepherd Gate Clock from 1852 and tarot packs such as
423-517: Is MMXXIV (2024). Roman numerals use different symbols for each power of ten, and there is no zero symbol, in contrast with the place value notation of Arabic numerals (in which place-keeping zeros enable the same digit to represent different powers of ten). This allows some flexibility in notation, and there has never been an official or universally accepted standard for Roman numerals. Usage varied greatly in ancient Rome and became thoroughly chaotic in medieval times. The more recent restoration of
470-403: Is a stub . You can help Misplaced Pages by expanding it . Anniversary Most countries celebrate national anniversaries, typically called national days . These could be the date of independence of the nation or the adoption of a new constitution or form of government. There is no definite method for determining the date of establishment of an institution, and it is generally decided within
517-431: Is a tradition favouring the representation of "4" as " IIII " on Roman numeral clocks. Other common uses include year numbers on monuments and buildings and copyright dates on the title screens of movies and television programs. MCM , signifying "a thousand, and a hundred less than another thousand", means 1900, so 1912 is written MCMXII . For the years of the current (21st) century, MM indicates 2000; this year
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#1733272097231564-553: Is closely associated with the ancient city-state of Rome and the Empire that it created. However, due to the scarcity of surviving examples, the origins of the system are obscure and there are several competing theories, all largely conjectural. Rome was founded sometime between 850 and 750 BC. At the time, the region was inhabited by diverse populations of which the Etruscans were the most advanced. The ancient Romans themselves admitted that
611-457: Is reduced to ↀ , IↃↃ (5,000) to ↁ ; CCIↃↃ (10,000) to ↂ ; IↃↃↃ (50,000) to ↇ ; and CCCIↃↃↃ (100,000) to ↈ . It is likely IↃ (500) reduced to D and CIↃ (1000) influenced the later M . John Wallis is often credited with introducing the symbol for infinity ⟨∞⟩ , and one conjecture is that he based it on ↀ , since 1,000 was hyperbolically used to represent very large numbers. Using
658-508: Is subtracted from 1). The word nulla (the Latin word meaning "none") was used to represent 0, although the earliest attested instances are medieval. For instance Dionysius Exiguus used nulla alongside Roman numerals in a manuscript from 525 AD. About 725, Bede or one of his colleagues used the letter N , the initial of nulla or of nihil (the Latin word for "nothing") for 0, in
705-559: Is that the word for 18 in Latin is duodeviginti — literally "two from twenty"— while 98 is duodecentum (two from hundred) and 99 is undecentum (one from hundred). However, the explanation does not seem to apply to IIIXX and IIIC , since the Latin words for 17 and 97 were septendecim (seven ten) and nonaginta septem (ninety seven), respectively. The ROMAN() function in Microsoft Excel supports multiple subtraction modes depending on
752-440: Is unknown which symbol represents which number). As in the basic Roman system, the Etruscans wrote the symbols that added to the desired number, from higher to lower value. Thus, the number 87, for example, would be written 50 + 10 + 10 + 10 + 5 + 1 + 1 = 𐌣𐌢𐌢𐌢𐌡𐌠𐌠 (this would appear as 𐌠𐌠𐌡𐌢𐌢𐌢𐌣 since Etruscan was written from right to left.) The symbols ⟨𐌠⟩ and ⟨𐌡⟩ resembled letters of
799-590: Is used by itself. Many anniversaries have special names. Etiquette in Society, in Business, in Politics and at Home by Emily Post , published in 1922, contained suggestions for wedding anniversary gifts for 1, 5, 10, 15, 20, 25, 50, and 75 years. Wedding anniversary gift suggestions for other years were added in later editions and publications; they now comprise what is referred to as the "traditional" list. Generally speaking,
846-674: The vinculum , conventional Roman numerals are multiplied by 1,000 by adding a "bar" or "overline", thus: The vinculum came into use in the late Republic , and it was a common alternative to the apostrophic ↀ during the Imperial era around the Roman world (M for '1000' was not in use until the Medieval period). It continued in use in the Middle Ages, though it became known more commonly as titulus , and it appears in modern editions of classical and medieval Latin texts. In an extension of
893-518: The C s and Ↄ s as parentheses) had its origins in Etruscan numeral usage. Each additional set of C and Ↄ surrounding CIↃ raises the value by a factor of ten: CCIↃↃ represents 10,000 and CCCIↃↃↃ represents 100,000. Similarly, each additional Ↄ to the right of IↃ raises the value by a factor of ten: IↃↃ represents 5,000 and IↃↃↃ represents 50,000. Numerals larger than CCCIↃↃↃ do not occur. Sometimes CIↃ (1000)
940-459: The vinculum , a three-sided box (now sometimes printed as two vertical lines and a vinculum ) is used to multiply by 100,000, thus: Vinculum notation is distinct from the custom of adding an overline to a numeral simply to indicate that it is a number. Both usages can be seen on Roman inscriptions of the same period and general location, such as on the Antonine Wall . The system
987-523: The [dies] Aquilae natalis was the "birthday of the eagle", the anniversary of the official founding of a legion. Anniversaries of nations are usually marked by the number of years elapsed, expressed with Latin words or Roman numerals . Latin terms for anniversaries are mostly straightforward, particularly those relating to the first thirty years (1–30), or multiples of ten years (30, 40, 50, 60, 70 etc.), or multiples of centuries or millenniums (100, 200, 300, 1000, 2000, 3000, etc.). In these instances,
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#17332720972311034-517: The decline of the Roman Empire . From the 14th century on, Roman numerals began to be replaced by Arabic numerals ; however, this process was gradual, and the use of Roman numerals persisted. One place they are often seen is on clock faces . For instance, on the clock of Big Ben (designed in 1852), the hours from 1 to 12 are written as: The notations IV and IX can be read as "one less than five" (4) and "one less than ten" (9), although there
1081-590: The " Form " setting. For example, the number "499" (usually CDXCIX ) can be rendered as LDVLIV , XDIX , VDIV or ID . The relevant Microsoft help page offers no explanation for this function other than to describe its output as "more concise". There are also historical examples of other additive and multiplicative forms, and forms which seem to reflect spoken phrases. Some of these variants may have been regarded as errors even by contemporaries. As Roman numerals are composed of ordinary alphabetic characters, there may sometimes be confusion with other uses of
1128-547: The 15th-century Sola Busca and the 20th century Rider–Waite packs. The base "Roman fraction" is S , indicating 1 ⁄ 2 . The use of S (as in VIIS to indicate 7 1 ⁄ 2 ) is attested in some ancient inscriptions and also in the now rare apothecaries' system (usually in the form SS ): but while Roman numerals for whole numbers are essentially decimal , S does not correspond to 5 ⁄ 10 , as one might expect, but 6 ⁄ 12 . The Romans used
1175-589: The Etruscan alphabet, but ⟨𐌢⟩ , ⟨𐌣⟩ , and ⟨𐌟⟩ did not. The Etruscans used the subtractive notation, too, but not like the Romans. They wrote 17, 18, and 19 as 𐌠𐌠𐌠𐌢𐌢, 𐌠𐌠𐌢𐌢, and 𐌠𐌢𐌢, mirroring the way they spoke those numbers ("three from twenty", etc.); and similarly for 27, 28, 29, 37, 38, etc. However, they did not write 𐌠𐌡 for 4 (nor 𐌢𐌣 for 40), and wrote 𐌡𐌠𐌠, 𐌡𐌠𐌠𐌠 and 𐌡𐌠𐌠𐌠𐌠 for 7, 8, and 9, respectively. The early Roman numerals for 1, 10, and 100 were
1222-446: The Etruscan ones: ⟨𐌠⟩ , ⟨𐌢⟩ , and ⟨𐌟⟩ . The symbols for 5 and 50 changed from ⟨𐌡⟩ and ⟨𐌣⟩ to ⟨V⟩ and ⟨ↆ⟩ at some point. The latter had flattened to ⟨⊥⟩ (an inverted T) by the time of Augustus , and soon afterwards became identified with the graphically similar letter ⟨ L ⟩ . The symbol for 100
1269-731: The Oregon Centennial Exposition was the presentation of The Oregon Story at the Exposition Arena, a spectacular featuring more than 700 actors, the Hollywood Bowl Ballet and the Portland Symphonic Choir. Music was composed by Meredith Willson with the production directed by Vladimir Rosing . Entertainment included Roy Rogers & Dale Evans , Lawrence Welk , Harry Belafonte , and Art Linkletter's House Party broadcast on CBS . The exposition's theme
1316-511: The basis of much of their civilization was Etruscan. Rome itself was located next to the southern edge of the Etruscan domain, which covered a large part of north-central Italy. The Roman numerals, in particular, are directly derived from the Etruscan number symbols : ⟨𐌠⟩ , ⟨𐌡⟩ , ⟨𐌢⟩ , ⟨𐌣⟩ , and ⟨𐌟⟩ for 1, 5, 10, 50, and 100 (they had more symbols for larger numbers, but it
1363-554: The day of the week, month, or astrological sign corresponding to the recipient's birthday . Roman numerals Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages . Numbers are written with combinations of letters from the Latin alphabet , each with a fixed integer value. The modern style uses only these seven: The use of Roman numerals continued long after
1410-451: The dots was variable and not necessarily linear . Five dots arranged like ( ⁙ ) (as on the face of a die ) are known as a quincunx , from the name of the Roman fraction/coin. The Latin words sextans and quadrans are the source of the English words sextant and quadrant . Each fraction from 1 ⁄ 12 to 12 ⁄ 12 had a name in Roman times; these corresponded to
1457-628: The following examples: Any missing place (represented by a zero in the place-value equivalent) is omitted, as in Latin (and English) speech: The largest number that can be represented in this manner is 3,999 ( MMMCMXCIX ), but this is sufficient for the values for which Roman numerals are commonly used today, such as year numbers: Prior to the introduction of Arabic numerals in the West, ancient and medieval users of Roman numerals used various means to write larger numbers (see § Large numbers below) . Forms exist that vary in one way or another from
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1504-520: The general standard represented above. While subtractive notation for 4, 40 and 400 ( IV , XL and CD ) has been the usual form since Roman times, additive notation to represent these numbers ( IIII , XXXX and CCCC ) continued to be used, including in compound numbers like 24 ( XXIIII ), 74 ( LXXIIII ), and 490 ( CCCCLXXXX ). The additive forms for 9, 90, and 900 ( VIIII , LXXXX , and DCCCC ) have also been used, although less often. The two conventions could be mixed in
1551-473: The institution by convention . The important dates in a sitting monarch's reign may also be commemorated, an event often referred to as a "jubilee". The Latin phrase dies natalis (literally "birth day") has become a common term, adopted in many languages, especially in intellectual and institutional circles, for the anniversary of the founding ("legal or statutory birth") of an institution, such as an alma mater (college or other school). In ancient Rome,
1598-627: The intermediate ones were derived by taking half of those (half an X is V , half a 𐌟 is ↆ and half a Φ/⊕ is D ). Then 𐌟 and ↆ developed as mentioned above. The Colosseum was constructed in Rome in CE 72–80, and while the original perimeter wall has largely disappeared, the numbered entrances from XXIII (23) to LIIII (54) survive, to demonstrate that in Imperial times Roman numerals had already assumed their classical form: as largely standardised in current use . The most obvious anomaly (
1645-413: The longer the period, the more precious or durable the material associated with it. There are variations according to some national traditions. There exist numerous partially overlapping, partially contradictory lists of anniversary gifts (such as wedding stones), separate from the "traditional" names. The concepts of a person's birthday stone and zodiac stone, by contrast, are fixed for life according to
1692-527: The more unusual, if not unique MDCDIII for 1903, on the north entrance to the Saint Louis Art Museum . There are numerous historical examples of IIX being used for 8; for example, XIIX was used by officers of the XVIII Roman Legion to write their number. The notation appears prominently on the cenotaph of their senior centurion Marcus Caelius ( c. 45 BC – 9 AD). On
1739-448: The name of the anniversary is generally derived from the Latin word(s) for the respective number of years. When anniversaries relate to fractions of centuries (125, 150, 175, 225, 250, 275 years—i.e. 1.25, 1.5, 1.75, 2.25, 2.5, and 2.75 centuries), the situation is not as simple. Roman fractions were based on a duodecimal system . From 1 ⁄ 12 to 8 ⁄ 12 they were expressed as multiples of twelfths ( uncia "twelfth";
1786-407: The names of the related coins: Other Roman fractional notations included the following: The Romans developed two main ways of writing large numbers, the apostrophus and the vinculum , further extended in various ways in later times. Using the apostrophus method, 500 is written as IↃ , while 1,000 is written as CIↃ . This system of encasing numbers to denote thousands (imagine
1833-547: The publicly displayed official Roman calendars known as Fasti , XIIX is used for the 18 days to the next Kalends , and XXIIX for the 28 days in February. The latter can be seen on the sole extant pre-Julian calendar, the Fasti Antiates Maiores . There are historical examples of other subtractive forms: IIIXX for 17, IIXX for 18, IIIC for 97, IIC for 98, and IC for 99. A possible explanation
1880-674: The same document or inscription, even in the same numeral. For example, on the numbered gates to the Colosseum , IIII is systematically used instead of IV , but subtractive notation is used for XL ; consequently, gate 44 is labelled XLIIII . Especially on tombstones and other funerary inscriptions, 5 and 50 have been occasionally written IIIII and XXXXX instead of V and L , and there are instances such as IIIIII and XXXXXX rather than VI or LX . Modern clock faces that use Roman numerals still very often use IIII for four o'clock but IX for nine o'clock,
1927-448: The same letters. For example, " XXX " and " XL " have other connotations in addition to their values as Roman numerals, while " IXL " more often than not is a gramogram of "I excel", and is in any case not an unambiguous Roman numeral. As a non- positional numeral system , Roman numerals have no "place-keeping" zeros. Furthermore, the system as used by the Romans lacked a numeral for the number zero itself (that is, what remains after 1
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1974-423: The smaller symbol ( I ) is subtracted from the larger one ( V , or X ), thus avoiding the clumsier IIII and VIIII . Subtractive notation is also used for 40 ( XL ), 90 ( XC ), 400 ( CD ) and 900 ( CM ). These are the only subtractive forms in standard use. A number containing two or more decimal digits is built by appending the Roman numeral equivalent for each, from highest to lowest, as in
2021-459: The source of the English words inch and ounce ) and from 9 ⁄ 12 to 11 ⁄ 12 they were expressed as multiple twelfths less than the next whole unit—i.e. a whole unit less 3 ⁄ 12 , 2 ⁄ 12 or 1 ⁄ 12 respectively. There were also special terms for quarter ( quadrans ), half ( semis ), and three-quarters ( dodrans ). Dodrans is a Latin contraction of de-quadrans which means "a whole unit less
2068-448: The unit as . Fractions less than 1 ⁄ 2 are indicated by a dot ( · ) for each uncia "twelfth", the source of the English words inch and ounce ; dots are repeated for fractions up to five twelfths. Six twelfths (one half), is S for semis "half". Uncia dots were added to S for fractions from seven to eleven twelfths, just as tallies were added to V for whole numbers from six to nine. The arrangement of
2115-634: Was "Frontier of the Future". Centennial-related events and attractions included a play, a musical , parades, specially commissioned artworks by muralist Carl Morris , and a railroad line that used two trains built for the Portland Zoo Railway (now the Washington Park and Zoo Railway ). Local communities created monuments to celebrate the anniversary, including a totem pole located at the Oregon Zoo and
2162-484: Was a circled or boxed X : Ⓧ, ⊗ , ⊕ , and by Augustan times was partially identified with the Greek letter Φ phi . Over time, the symbol changed to Ψ and ↀ . The latter symbol further evolved into ∞ , then ⋈ , and eventually changed to M under the influence of the Latin word mille "thousand". According to Paul Kayser, the basic numerical symbols were I , X , 𐌟 and Φ (or ⊕ ) and
2209-400: Was written variously as ⟨𐌟⟩ or ⟨ↃIC⟩ , and was then abbreviated to ⟨ Ↄ ⟩ or ⟨ C ⟩ , with ⟨ C ⟩ (which matched the Latin letter C ) finally winning out. It might have helped that C was the initial letter of CENTUM , Latin for "hundred". The numbers 500 and 1000 were denoted by V or X overlaid with
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