memorable day of our life celebrate this memorable day because that day comes after long 1000 years do some good work for this society because when that day come after 1000 year then everyone remember you for your good work A millennium (plural millennia) is a period of time equal to 1000 years. It derives from the Latin mille, thousand, and annus, year. It is often, but not necessarily, related to a particular dating system. Sometimes, it is used specifically for periods of thousand years that begin at the starting point (initial reference point) of the calendar in consideration (typically the year "1"), or in later years that are whole number multiples of a thousand years after it. The term can also refer to an interval of time beginning on any date. Frequently in the latter case (and sometimes also in the former) it may have religious or theological implications (see millenarianism). Sometimes in use, such an interval called a "millennium" might be interpreted less precisely, i.e., not always being exactly 1000 years long. It could be, for example, 1050, 1500, etc.Ordinal[edit] The original method of counting years was ordinal,[citation needed] whether 1st year A.D. or regnal 10th year of King Henry VIII. This ordinal numbering is still present in the names of the millennia and centuries, for example 1st Millennium or the 20th century, and sometimes in the names of decades, e.g., 1st decade of the 21st century.The main issues arise from the content of the various year ranges. Similar issues affect the contents of centuries. Decades are usually referred to by their leading numbers and are therefore immune to this controversy: the decade called 1990s would by its naming not include 2000. Similarly the 100 years comprising the 1900s share 99 years in common with the twentieth century, but do not include 2000. Those following ordinal year names naturally choose 2001--2100 as the current century 2001--3000 as the current millennium Those following cardinal year names equally naturally choose 2000--2099 as the current century 2000--2999 as the current millennium.The common Western calendar (the Gregorian calendar) has been defined with counting origin 1. Thus each period of 1,000 years concludes with a year number with three zeroes, e.g., the first thousand years in the Western calendar included the year 1000. However, there are two viewpoints about how millennia should be thought of in practice. One viewpoint relies on the formal operation of the calendar, while the other appeals to other notions that attract popular sentiment. Stephen Jay Gould argued that the choice is arbitrary, and since the question revolves around rules made by people, rather than natural phenomena that is subject to experimental measurement, the matter cannot be resolved.[1] A number of countries have legally adopted ISO 8601,[citation needed] also used in other contexts, which uses the astronomical calendar, in which year counting starts at 0. Thus, when using this calendar, the millennium starts at x000 and ends at x999. There was a popular debate leading up to the celebrations of the year 2000 as to whether the beginning of that year should be understood (and celebrated) as the beginning of a new millennium. Historically, there has been debate around the turn of previous decades, centuries, and millennia. The issue is tied to the convention of using ordinal numbers to count millennia (as in "the third millennium"), as opposed to using cardinal numbers (as in "the two thousands"), which is unambiguous as it does not depend on which year counting starts. The first convention is common in English speaking countries, but the latter is favored in for example Sweden (tvåtusentalet, which translates literally as the two thousands period).source - http://en.wikipedia.org/wiki/Millennium

• published: 11 Dec 2013
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