Anniversary - Wikipedia Anniversary For other uses, see Anniversary ( disambiguation ). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( July 2007 ) On the 40th anniversary of his reign, the King of Sweden toasts the city 's Mayor in front of Stockholm Palace. Memorial plaque presented by the NATIONAL CAPITAL SESQUICENTENNIAL COMMISSION, 1951 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. For example, the first event is the initial occurrence or, if planned, the inaugural of the event. One year later would be the first anniversary of that event. The word was first used for Catholic feasts to commemorate saints. 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. The important dates in a sitting monarch 's reign may also be commemorated, an event often referred to as a `` jubilee ''. Contents 1 Anniversary names 1.1 Latin - derived numerical names 2 Anniversary symbols 3 See also 4 References 5 External links Anniversary names Birthdays are the most common type of anniversary, when someone 's birth date is commemorated each year. The actual celebration is sometimes moved for practical reasons, as in the case of an official birthday. Wedding anniversaries are also often celebrated, on the same day of the year as the wedding occurred. Death anniversary. 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, 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 - derived numerical names hide This article has multiple issues. Please help improve it or discuss these issues on the talk page. ( Learn how and when to remove these template messages ) This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. ( March 2011 ) This section contains weasel words : vague phrasing that often accompanies biased or unverifiable information. Such statements should be clarified or removed. ( March 2011 ) This section possibly contains original research. Please improve it by verifying the claims made and adding inline citations. Statements consisting only of original research should be removed. ( February 2018 ) Latin terms for anniversaries are mostly straightforward, particularly those relating to the first twenty years ( 1 -- 20 ), or multiples of ten years ( 30, 40, 60, 70 etc. ), or multiples of centuries or millennia ( 100, 200, 300, 1000, 2000, 3000, etc. ) In these instances, the name of the anniversary is generally derived from the Latin word ( s ) for the respective number of years. However, when anniversaries relate to fractions of centuries ( 125, 150, 175, 250 years -- i.e. 1.25, 1.5, 1.75, and 2.5 centuries ), the situation is not as simple. Roman fractions were based on a duodecimal system. From ​ ⁄ to ​ ⁄ they were expressed as multiples of twelfths ( uncia `` twelfth '' ; the source of the English words inch and ounce ) and from ​ ⁄ to ​ ⁄ they were expressed as multiple twelfths less than the next whole unit -- i.e. a whole unit less ​ ⁄, ​ ⁄ or ​ ⁄ 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 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 11⁄2. While secundus is Latin for `` second '', and bis for `` twice '', these terms are not used such as in sesqui - secundus. Instead sesqui ( or ses ) is used by itself. Anniversary Latin - derived term Other terms Comments 1⁄2 yearly Semiannual 1 year Annual Paper 2 years Biennial Cotton 3 years Triennial Leather 4 years Quadrennial Linen 5 years Quinquennial Wood 6 years Sexennial Iron 7 years Septennial Wool 8 years Octennial Bronze 9 years Novennial Copper 10 years Decennial Tin / Aluminium 11 years Undecennial Steel 12 years Duodecennial Silk 13 years Tredecennial Lace 14 years Quattuordecennial Ivory 15 years Quindecennial Crystal 20 years Vigintennial / Vicennial China / Porcelain 25 years Quadranscentennial Silver jubilee 40 years Quadragennial Ruby jubilee 50 years Semicentennial / Quinquagenary Golden jubilee 60 years Sexagennial / Sexagenary Diamond jubilee 65 years Sapphire jubilee 70 years Septuagennial Platinum jubilee 100 years Centennial Centenary 125 years Quasquicentennial Term is broken down as quasqui - ( and a quarter ) centennial ( 100 years ). Quasqui is a contraction from quadrans `` a quarter '' plus the clitic conjunction - que `` and ''. The term was coined by Funk and Wagnalls editor Robert L. Chapman in 1961. 150 years Sesquicentennial Term broken down as sesqui - ( one and a half ) centennial ( 100 years ) 175 years Dodransbicentennial Dodrans is a Latin contraction of de-quadrans which means `` a whole unit less a quarter '' ( de means `` from '' ; quadrans means `` quarter '' ). 175 years is a quarter century less than the next whole ( bi ) century or 175 = ( − 25 + 200 ). Dodrabicentennial Alternative Latin form of Dodransbicentennial Dequasbicentennial Alternative Latin form of Dodransbicentennial Dosquicentennial Dosquicentennial has been used in modern times and this is perhaps a modern contraction of `` de-quadrans ''. However, it seems inappropriate to combine the terms que and de when dealing with such Roman fractions. In any event, if such a conjunction was appropriate then it would perhaps more likely have been `` Dosquibicentennial '' ( but the result is little shorter anyway ). Demisemiseptcentennial Probably a modern coined term : demisemiseptcentennial ; literally one - half ( demi - ) × one - half ( semi - ) × seven ( sept - ) × 100 years ( centennial ) -- also demisemiseptcentenary. Quartoseptcentennial Probably a modern coined term : quartoseptcentennial ; literally one - quarter ( quarto - ) × seven ( sept - ) × 100 years ( centennial ) -- also quartoseptcentenary. Terquasquicentennial First used by Bell Laboratories in celebrating its 175th anniversary as a corporation. Is a coined word for an anniversary of 175 years, but the elements of the word literally refer to an anniversary of 375 years, as follows : ter - ( 3 ) × quasqui - ( 11⁄4 ) × centennial ( 100 years ) Septaquintaquinque - centennial Suggested by lexicographer Robert L. Chapman to William Safire ; first appeared in Safire 's column, `` On Language '' ( The New York Times Magazine, February 12, 1995 ). It is a coined word for an anniversary of 175 years, but the elements of the word literally refer to an anniversary of 35,000 years, as follows : septaquinta - ( 70 ) × quinque - ( 5 ) × centennial ( 100 years ) 200 years Bicentennial Bicentenary 250 years Sestercentennial - To express 21⁄2 in Latin it would be expressed as `` half - three ''. The term relates to being halfway ( from the second ) to the third integer. In Latin this is `` Sestertius '' which is a contraction of semis ( halfway ) tertius ( third ) -- hence Sestercentennial. Semiquincentennial Probably a modern coined term : semi - ( half ) × quin ( 5 ) × centennial ( 100 years ) = 250 years. Used by Brown University in 2015. Bicenquinquagenary Used by Princeton University in 1996, Reading, Pennsylvania in 1998, and Washington and Lee University in 1999. It is a coined word for an anniversary of 250 years : bi - ( 2 ) × cen ( t ) - ( 100 ) + quinquagenary ( 50 years ). Quarter - millennial Meaning one quarter of one thousand years. 300 years Tercentenary / Tricentenary Tercentennial / Tricentennial 350 years Sesquarcentennial A modern coined term ; sesquarcentennial for 350 years is deduced here from the `` Sestertius '' definition for 250 years above. For 350 years it relates to being halfway from the third to the fourth integer ; thus a contraction of semis ( halfway ) and quartus ( fourth ) ; hence Sesquarcentennial. Semiseptcentennial Probably a modern coined term : semi - ( half ) × sept ( 7 ) × cen ( t ) - ( 100 ) × centennial ( 350 years ) 400 years Quadricentennial Quadricentenary / Quatercentenary 500 years Quincentenary Quincentennial 600 years Sexcentenary Sexacentennial 700 years Septcentennial Septuacentennial Probably a coined term ; earliest known use in March 1988. Chiang Mai Septcentennial Stadium ( Chiang Mai, Thailand ) was completed in 1991. 800 years Octocentenary Octocentennial 900 years Nonacentennial 1000 years Millennial 1500 years Sesquimillennial Term broken down as sesqui - ( one and a half ) millennial ( 1000 years ) 2000 years Bimillennial Anniversary symbols 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, the longer the period, the more precious or durable the material associated with it. See wedding anniversary for a general list of the wedding anniversary symbols ; however, there are variations in some national traditions. Furthermore, 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 the day of the week, month, or astrological sign corresponding to the recipient 's birthday. See also Holidays portal List of historical anniversaries Quinquennial Neronia Wedding anniversary References ^ Jump up to : `` SA 175th Jubilee ''. Clipper Ship ' City of Adelaide '. Archived from the original on 27 November 2013. Retrieved March 8, 2011. So the name for a 175th anniversary ? For now it is really up to the preference of the reader. One day one of these terms may make its way into popular usage, become accepted, and find a place in a dictionary. Jump up ^ Chapman, Robert L. ( February 1965 ). `` The History of `` Quasquicentennial '' ``. American Speech. 40 ( 01 ) : 53 -- 57. doi : 10.2307 / 454178. ISSN 0003 - 1283. JSTOR 454178. It is our policy to reply as courteously and helpfully as we can to such requests, and I answered Mr. Hatten on August 7, suggesting quasquicentennial. Since this is a history, I shall quote the letter in full : Dr. Wilfred Funk has passed your letter of July I on to us. We are happy to help, if you feel that you really want a new Latinate word meaning `` one hundred and twenty - fifth anniversary ''. The best model upon which to form the word is `` sesquicentennial '', meaning `` one hundred and fiftieth anniversary ''. We need a first element meaning `` plus a fourth '', analogous with `` sesqui '' which means `` plus a half ''. `` Sesqui '' is apparently formed from `` semis que '', meaning `` and a half ''. Now, both `` quarta '' and `` quadrans '' mean `` a fourth '', so we may begin with either `` quarta que '' or `` quadrans que ''. The trick is to combine and shorten one of these as `` sesqui '' was combined and shortened from `` semis que ''. If we follow the model of `` sesqui '' very closely, retaining the stressed vowel and final `` s '' of `` quadrans '', we get the word `` quasquicentennial ''. Combining and shortening in other ways we can also get `` quadqui - '', `` quansqui - '', `` quarsqui - '', and perhaps several others. On the grounds that it is closest to the model and also probably the least ugly of the set, I would choose `` quasquicentennial '' ( pronounced kwahskwee - ) as the new word. Of course, you may decide that you do not really want or need a new word. There is no point in proliferating them needlessly. I should add, perhaps, that this word would not appear in any of our dictionaries until it had established itself in wide currency, even if you should decide to use it. I hope we have been able to help you. Jump up ^ Missouri Secretary of State Local Records Inventory Database ^ Jump up to : `` Under the Cupola ''. Neighbors of Batavia. July -- August 2008. p. 29. The etymology of `` demisemiseptcentennial '' is compared to `` hemidemisemiquaver '', a 64th note. Jump up ^ `` Pickle Barrel : 175th - birthday bash planned for Dillsburg. '' The Patriot - News ( Mechanicsburg, Penn. ), Wednesday, 18 June 2008. Jump up ^ `` Brown lowers the curtain on 15 - month semiquincentenary ''. Brown University. 2015 - 06 - 11. Retrieved 2015 - 06 - 11. Jump up ^ McCleery, William ( November 19, 1997 ). `` The Meaning of the 250th ''. Princeton Alumni Weekly. Princeton University. Retrieved March 23, 2011. Faster, it seems, than you can say `` bicenquinquagenary '', Princeton 's 250th anniversary has come and gone. Jump up ^ `` A Memorial of the Celebration of the Two Hundred and Fiftieth Anniversary of the Settlement of the Town of Northampton, Massachusetts ''. City of Northampton. Archived from the original on January 27, 2013. Retrieved March 23, 2011. Jump up ^ Kersten, Glenn ( March 1988 ). `` Naming the Anniversaries ''. Quidnunc. Archived from the original on 21 January 2005. Jump up ^ Architects 49 : Selected and Current Work. ( The Master Architect Series ; 5. ) Image Publishing Group, 2006. ISBN 978 - 1 - 876907 - 09 - 9 Jump up ^ `` 22. The Day of the Wedding. Post, Emily. 1922. Etiquette ''. bartleby.com. External links Look up anniversary in Wiktionary, the free dictionary. Wikimedia Commons has media related to Anniversaries. GND : 4019625 - 2 LCCN : sh85005357 NARA : 10637409 NDL : 00565819 Retrieved from `` https://en.wikipedia.org/w/index.php?title=Anniversary&oldid=842108578 '' Categories : Anniversaries Hidden categories : Articles needing additional references from July 2007 All articles needing additional references Articles needing additional references from March 2011 Articles with weasel words from March 2011 Articles that may contain original research from February 2018 All articles that may contain original research Articles with multiple maintenance issues All Wikipedia articles needing words, phrases or quotes attributed Wikipedia articles needing words, phrases or quotes attributed from March 2011 All articles with unsourced statements Articles with unsourced statements from March 2011 Wikipedia articles with GND identifiers Wikipedia articles with LCCN identifiers Talk Contents About Wikipedia Català Čeština Cymraeg Deutsch Español Esperanto فارسی 한국어 हिन्दी Ido Italiano Latviešu മലയാളം မြန်မာဘာသာ 日本 語 Polski Русский Simple English తెలుగు 11 more Edit links This page was last edited on 20 May 2018, at 08 : 14. 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Question: how many years is quarter of a century
Answer: 25 years