Calendar Types

Bayley, Alistair Alistair_Bayley at
Mon Feb 14 06:43:16 EST 2005

> From: Ketil Malde [mailto:ketil+haskell at] 
> You also need to specify, or let the user specify, the order of
> arithmetic.  I.e. adding a day and then a second is different from
> doing it the other way around.

Duration arithmetic is not commutative? Can you give some examples please,
because I'm not able to imagine any.

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