Why shouldn't the cal program show years 10000 onward?
> cal 1 10000
cal: illegal year value: use 1-9999
Do you really care?
I cared enough to file a bug,
but I won't lose any sleep if it doesn't get fixed.
It just seems like a completely arbitrary limitation. I can find no reason
for it. The mathematics are the same past the year 9999. The type-imposed
limit for year appears to be (((MAX_LONG - 379) * 400 / 146097) + 1),
or 5879610 for a 32-bit long. This limitation occurs in the day_in_week()
I tried removing the artificial limitation and it appears to give