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@Z. Dailey asks a mathematical puzzle Important days in history... and to come! with a series of dates in years 1973, 1978, 1983, 1992, 2005.

My puzzle asks the question: What is the previous date in my series? Explain!!

.......... .., .....
      June 22, 1973  
.......... .., .....
      June 16, 1978
      June 11, 1983
     March 25, 1992
     April 14, 2005

Hint:

"rudder as a male swan"

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  • $\begingroup$ A male swan being a rot13(pbo) $\endgroup$ – Khale_Kitha Mar 24 '16 at 20:42
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    $\begingroup$ Apparently ebhtu nf n pbo is a phrase $\endgroup$ – question_asker Mar 24 '16 at 21:49
  • $\begingroup$ Logic dictates there's a high chance that the year is 1969, the fake moon landing year. $\endgroup$ – Overmind Sep 7 '16 at 11:07
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    $\begingroup$ @Overmind I would question your failed conclusion. $\endgroup$ – garr890354839 Nov 29 '16 at 14:31
  • $\begingroup$ Nothing failed about it. Also it's valid from a math p.o.v. ;check the MM/DD also. $\endgroup$ – Overmind Dec 9 '16 at 6:54

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