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    SubjectRe: February 30th 2000
    On 12 Jan 2000, H. Peter Anvin wrote:

    > Followup to: <200001122154.OAA07786@webber.adilger.net>
    > By author: Andreas Dilger <adilger@home.com>
    > In newsgroup: linux.dev.kernel
    > >
    > > Daniel writes:
    > > > This year we're going to have the day February 30th and neither Linux, AIX,
    > > > Windows NT, 98, 95 know this problem. Feb30th happens each 400 years (Last
    > > > time we had that was year 1600). There's a webpage (in portuguese) from IDG
    > > > http://www.uol.com.br/idgnow/corp/corp2000-01-10e.shl (you can translate it
    > > > at http://babelfish.altavista.com/cgi-bin/translate)
    > >
    > > This is totally wrong. The year 2000 is not even a leap year (i.e. NO Feb 29
    > > either), so your source of information is incorrect. It is completely
    > > unlikely that all of these independently created OSs have gotten this wrong,
    > > despite what one thinks of some of them.
    > >
    >
    > 2000 is a leap year. A regular one. On the Gregorian calendar, 1700,
    > 1800, 1900, 2100, 2200 and 2300 are not leap years, but 1600, 2000,
    > and 2400 are. Note that when a certain jurisdiction switched to the
    > Gregorian calendar is, at one level, irrelevant -- it is
    > perfectly legitimate to refer to the year 400 on the Gregorian
    > calendar being a leap year, despite the fact that the Gregorian
    > calendar was invented in the 16th Century AD.
    >
    > -hpa
    > --

    Err. My calendar seems okay to me <grin>. Some folks believe everything
    they see in text. Especially if it was presented on a computer screen.

    Script started on Thu Jan 13 09:37:08 2000
    # cal 2000
    2000

    January February March
    Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
    1 1 2 3 4 5 1 2 3 4 5
    2 3 4 5 6 7 8 6 7 8 9 10 11 12 6 7 8 9 10 11 12
    9 10 11 12 13 14 15 13 14 15 16 17 18 19 13 14 15 16 17 18 19
    16 17 18 19 20 21 22 20 21 22 23 24 25 26 20 21 22 23 24 25 26
    23 24 25 26 27 28 29 27 28 29 30 27 28 29 30 31
    30 31
    April May June
    Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
    1 2 1 2 3 4 5 6 7 1 2 3 4
    3 4 5 6 7 8 9 8 9 10 11 12 13 14 5 6 7 8 9 10 11
    10 11 12 13 14 15 16 15 16 17 18 19 20 21 12 13 14 15 16 17 18
    17 18 19 20 21 22 23 22 23 24 25 26 27 28 19 20 21 22 23 24 25
    24 25 26 27 28 29 30 29 30 31 26 27 28 29 30

    July August September
    Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
    1 2 1 2 3 4 5 6 1 2 3
    3 4 5 6 7 8 9 7 8 9 10 11 12 13 4 5 6 7 8 9 10
    10 11 12 13 14 15 16 14 15 16 17 18 19 20 11 12 13 14 15 16 17
    17 18 19 20 21 22 23 21 22 23 24 25 26 27 18 19 20 21 22 23 24
    24 25 26 27 28 29 30 28 29 30 31 25 26 27 28 29 30
    31
    October November December
    Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa Su Mo Tu We Th Fr Sa
    1 1 2 3 4 5 1 2 3
    2 3 4 5 6 7 8 6 7 8 9 10 11 12 4 5 6 7 8 9 10
    9 10 11 12 13 24 15 13 14 15 16 17 18 19 11 12 13 14 15 16 17
    16 17 18 19 20 21 22 20 21 22 23 24 25 26 18 19 20 21 22 23 24
    23 24 25 26 27 28 29 27 28 29 30 25 26 27 28 29 30 31
    30 31

    # exit
    exit
    Script done on Thu Jan 13 09:38:06 2000



    Cheers,
    Dick Johnson

    Penguin : Linux version 2.3.36 on an i686 machine (400.59 BogoMips).


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