From: "Norman H. Cohen" <ncohen@watson.ibm.com>
Subject: Re: language wars (results 13 September) last posting
Date: 1996/09/18
Date: 1996-09-18T00:00:00+00:00 [thread overview]
Message-ID: <32406D89.233E@watson.ibm.com> (raw)
In-Reply-To: 51bv60$8d@pheidippides.axion.bt.co.uk
Andrew Gierth wrote:
> Useless (but true) factoid:
>
> The 13th day of the month is more often Friday than any other day of the
> week.
I apologize for the off-topic posting (especially when it
is cross-posted to so many newsgroups, and thus off so
many topics at once), but it should be pointed out,
before this becomes an urban legend, that this "factoid"
is patently false!
In any 2800-year cycle, the 13th will come out on each
day of the week the same number of times. In fact, this
is true of any 28-year cycle that does not include a century
year that is not a leap year (e.g. 1800, 1900, 2100, 2200).
--
Norman H. Cohen ncohen@watson.ibm.com
http://www.research.ibm.com/people/n/ncohen/
next prev parent reply other threads:[~1996-09-18 0:00 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
1996-09-13 0:00 language wars (results 13 September) last posting Roy Gardiner
1996-09-13 0:00 ` William Clodius
1996-09-13 0:00 ` Peter Seebach
1996-09-21 0:00 ` Robert Dewar
1996-09-21 0:00 ` Robert Dewar
1996-09-16 0:00 ` Robert Fahey
1996-09-18 0:00 ` Norman H. Cohen [this message]
1996-09-18 0:00 ` James Giles
1996-09-18 0:00 ` James Giles
1996-09-18 0:00 ` Andrew Gierth
1996-09-18 0:00 ` Luke Chao
1996-09-19 0:00 ` Andrew Gierth
1996-09-19 0:00 ` Daniel J. Long
1996-09-21 0:00 ` Ken Pizzini
1996-09-24 0:00 ` Art Schwarz
1996-09-26 0:00 ` Matthew D. Healy
1996-09-29 0:00 ` Randy MacDonald
1996-10-03 0:00 ` galina.kasminskaya
1996-10-03 0:00 ` Dave Tholen
1996-09-26 0:00 ` Ken Pizzini
1996-09-29 0:00 ` Paul Gilmartin
1996-09-21 0:00 ` Ken Pizzini
1996-09-19 0:00 ` Norman H. Cohen
1996-09-20 0:00 ` John Girash
1996-09-20 0:00 ` John Girash
1996-09-20 0:00 ` Friday 13th, try it yourself (was Language Wars..) Clinton Pierce
1996-09-21 0:00 ` Russell Mosemann
1996-09-25 0:00 ` Barrie Walker
1996-09-26 0:00 ` Jim Shapiro
1996-09-25 0:00 ` Ken Pizzini
1996-09-25 0:00 ` Results of my test: Re: Friday 13th, try it yourself Lee Crites
1996-09-25 0:00 ` William Clodius
1996-09-27 0:00 ` Dik T. Winter
[not found] ` <52qpqt$1b3l@ilx018.iil.intel.com>
1996-10-02 0:00 ` Dik T. Winter
1996-10-02 0:00 ` Ken Pizzini
1996-09-26 0:00 ` Dr John Stockton
1996-09-26 0:00 ` Dr John Stockton
1996-09-26 0:00 ` Lee Crites
1996-09-26 0:00 ` John Winters
1996-09-26 0:00 ` Daan Sandee
1996-09-26 0:00 ` Jeff Drummond
1996-09-30 0:00 ` Ray Dunn
1996-09-26 0:00 ` Adam Beneschan
1996-09-27 0:00 ` Glen Clark
1996-09-27 0:00 ` CHI Research, Inc.
1996-09-27 0:00 ` Lee Crites
1996-09-28 0:00 ` John Winters
1996-09-30 0:00 ` Adam Beneschan
1996-10-01 0:00 ` Mike McCarty
[not found] ` <199609302101.JAA04610@kauri.vuw.ac.nz>
1996-09-30 0:00 ` Lee Crites
1996-09-21 0:00 ` Friday 13th, try it yourself (was Language Wars..) Russell Mosemann
1996-09-23 0:00 ` Matthew D. Healy
1996-09-23 0:00 ` Dik T. Winter
1996-09-25 0:00 ` Paul Gilmartin
1996-09-22 0:00 ` Dr John Stockton
1996-09-23 0:00 ` Randy MacDonald
1996-09-23 0:00 ` Dik T. Winter
1996-09-25 0:00 ` John Harper
1996-09-25 0:00 ` jupiter
1996-09-23 0:00 ` Dr John Stockton
1996-09-24 0:00 ` language wars (results 13 September) last posting Andrew Gierth
1996-09-24 0:00 ` Art Schwarz
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