| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Bruno Wolff III <bruno(at)wolff(dot)to> |
| Cc: | Dann Corbit <DCorbit(at)connx(dot)com>, Greg Stark <gsstark(at)mit(dot)edu>, Tino Wildenhain <tino(at)wildenhain(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org> |
| Subject: | Re: Imprecision of DAYS_PER_MONTH |
| Date: | 2005-07-22 19:03:13 |
| Message-ID: | 200507221903.j6MJ3Dc13936@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
Bruno Wolff III wrote:
> On Thu, Jul 21, 2005 at 13:47:29 -0700,
> Dann Corbit <DCorbit(at)connx(dot)com> wrote:
> > In round figures:
> >
> > Since there are 365.2422 days per tropical year, there are 31556926
> > seconds per year (give or take leap seconds).
> >
> > Ref:
> > http://www.grc.nasa.gov/WWW/K-12/Numbers/Math/Mathematical_Thinking/cale
> > ndar_calculations.htm
>
> According to the current calendar (again ignoring leap seconds) there
> are exactly 365.2425 days per year on average. I think it makes sense to use
> this number when dealing with calendar years and months.
Someone came up with 365.2422. Which is better?
--
Bruce Momjian | http://candle.pha.pa.us
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 359-1001
+ If your life is a hard drive, | 13 Roberts Road
+ Christ can be your backup. | Newtown Square, Pennsylvania 19073
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