[Haskell-cafe] Re: Can't do basic time operations with System.Time

[John Goerzen]

On 2005-01-21, Peter Simons <simons at cryp.to> wrote:
> >                 24 * ((fromIntegral $ tdDay td) +
> >                       30 * ((fromIntegral $ tdMonth td) +
> >                             365 * (fromIntegral $ tdYear td)))))
>
> I was wondering: Does this calculation account for leap
> years? Does it have to?

I also wondered about all months being 30 days.  But this exact
algorithm is used in fptools' normalizeTimeDiff, and it seems to work
out correctly, so I guess the timeDiff functions assume that every month
has 30 days and every year has 365.

When you make that assumption, leap seconds suddenly stop mattering :-)

-- John