Bo Peng wrote:
> Under linux and windows,
>
>
>>as.Date("6666-06-06")
>
> [1] "6666-06-06"
>
>>as.Date("7777-07-07")
>
> [1] "1970-01-01"
>
>
> Feature? Bug? help(as.Date) does not mention this case.
Well, bug, if you really want to call it a bug that you cannot represent
the year 6666. ;-)
I guess this is some overflow in do_POSIXlt2D that is not protected
against misuse. Don't see the point right now, I have to admit.
> as.Date("6970-12-31")
[1] "6970-12-31"
> as.Date("6971-01-01")
[1] "1970-01-01"
So we cannot represent more than 5000 years into the future, roughly
speaking. *Guess* the problem is that we need more than 4 digits for +/-
5000 years (sum=10000).
Uwe Ligges
> Bo.
>
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