11-12-13 – Last such sequence of the century

11th December 2013 (or in short 11-12-13) is just a few hours away here. It’s the last date of the 21st century with  such an extraordinary pattern of numbers.  In any calendar of the world, such date will be seen in 22nd century after 87 years and 54 days from today — on February 3, 2101, if all kind of date setup permutations $ are used — first of which being the usual day-month-year , second  month-day-year format and the third being year-month-date and writing only two last digits of year. For example, if 18th December 2013 is written as 18-12-13, then it can also be written as 12-18-13 and as 13-18-12. Every century sees such dates exactly about 33 times –all in first & second decades of the century.

In the twenty-first century following permutations were of the same pattern:

  1. 1-2-3
    February 3, 2001 | January 2, 2003  | February 1, 2003
  2. 2-3-4
    March 4, 2002 | February 3, 2004 | March 2, 2004
  3. 3-4-5
    April 5, 2003 | March 4, 2005 | April 3, 2005
  4. 4-5-6
    May 6, 2004 | April 5, 2006 | May 4, 2006
  5. 5-6-7
    June 7, 2005 | May 6, 2007 | June 5, 2007
  6. 6-7-8
    July 8, 2006 | June 7, 2008 | July 6, 2008
  7. 7-8-9
    August 9, 2007 | July 8, 2009 | August 7, 2009
  8. 8-9-10
    September 10, 2008 | August 9, 2010 | September 8, 2010
  9. 9-10-11
    October 11, 2009 | September 10, 2011 | October 9, 2011
  10. 10-11-12
    November 12, 2010 | October 11, 2012 | November 10, 2012
  11. 11-12-13
    December 13, 2011 | November 12, 2013 | December 11, 2013

So, the next dates with similar pattern will be:-  February 3, 2101 | January 2, 2103  | February 1, 2103.

And today, at 08:09:10 :-

08 - 09-10 of 11-12-13 : An epic date.

Gaurav Tiwari

A designer by profession, a mathematician by education but a Blogger by hobby. With an experience of over seven years with WordPress, PHP and CSS3, Gaurav is capable of doing almost anything related to these. Beyond that, He is a mathematics graduate & a civil service aspirant.

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