sequential time
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A sequential time is one in which the numbers form a normal sequence, such as 1:02:03 4/5/06 (two minutes and three seconds past 1 am on 4 May 2006 (or April 5, 2006 in the United States) or the same time and date in the "06" year of any other century). Short sequential times such as 1:23:45 or 12:34:56 appear every day. Larger sequential times rarely appear, such as 12:34:56 7/8/90, or 01:23:45 on 6/7/89. These times can be dependent on the date format being used; the ''month/day'' format will produce different results from the ''day/month'' format. This term, however, is not limited to simple counting. Other sequences, such as the decimal numbers of the mathematical constants ( 3/14/1592), (2/7/1828), and the
square root of two The square root of 2 (approximately 1.4142) is a positive real number that, when multiplied by itself, equals the number 2. It may be written in mathematics as \sqrt or 2^, and is an algebraic number. Technically, it should be called the princi ...
(1/4/1421) are also noted. Number sequences such as the
Fibonacci sequence In mathematics, the Fibonacci numbers, commonly denoted , form a sequence, the Fibonacci sequence, in which each number is the sum of the two preceding ones. The sequence commonly starts from 0 and 1, although some authors start the sequence from ...
(1/1/2358) can also be found in time stamps. These dates are particularly popular with couples getting married who are seeking unique wedding and anniversary dates. Dates with repeating numbers such as July 7, 2007 "7/7/07" are also popular. Palindromic times can also be observed, e.g. 10:02:10 on 11/01/2001 (two minutes and ten seconds after 10 am on 11 January 2001 in parts of the world using ''month/day'' format) was the first fully
palindromic A palindrome is a word, number, phrase, or other sequence of symbols that reads the same backwards as forwards, such as the words ''madam'' or ''racecar'', the date and time ''11/11/11 11:11,'' and the sentence: "A man, a plan, a canal – Pana ...
time sequence of the twenty-first century. The last palindromic time sequence was at 02:02:10 at 11/01/2020 (two minutes and twenty-one seconds past 2 am on 11 January 2020 in most of the world). A sequential time occurred during
Pi Day Pi Day is an annual celebration of the mathematical constant (pi). Pi Day is observed on March 14 (3/14 in the ''month/day'' format) since 3, 1, and 4 are the first three significant figures of . It was founded in 1988 by Larry Shaw, an e ...
on 3/14/15 at 9:26:53.58979... following the sequence of pi to all digits.


Historical events

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Prohibition Prohibition is the act or practice of forbidding something by law; more particularly the term refers to the banning of the manufacture, storage (whether in barrels or in bottles), transportation, sale, possession, and consumption of alcohol ...
ended in Finland April 5, 1932 at 10 am (5.4.32 10 o'clock)5-4-3-2-1-0: History of Alko
/ref> *
Chernobyl Nuclear Disaster The Chernobyl disaster was a nuclear accident that occurred on 26 April 1986 at the No. 4 reactor in the Chernobyl Nuclear Power Plant, near the city of Pripyat in the north of the Ukrainian SSR in the Soviet Union. It is one of only two nucl ...
occurred on April 26, 1986 at 01:23:45 MSK (UTC +3). * Beijing Summer Olympics started on 8 August 2008 at 8.08:08 pm (8 is a
lucky number In number theory, a lucky number is a natural number in a set which is generated by a certain "sieve". This sieve is similar to the Sieve of Eratosthenes that generates the primes, but it eliminates numbers based on their position in the remain ...
in China)


See also

* Square Root Day * Numerology


References

{{Reflist
The perfect time
by John Hand, BBC News Unofficial observances