[TUHS] History of cal(1)?

[Douglas McIlroy via TUHS]

> [cal(1)] has all the logic to adjust for 16th century
> calendar changes ...  (Try "cal 9 1752")
> My impression is that [it is] overimplemented.

The fact that a 16th century change is illustrated by an 18th century
example suggests that not quite "all the logic" is there. It's good
for Great Britain and its colonies, but not elsewhere. So I'd say it's
underimplemented :)

Doug