Zefram writes:
> scheme@(guile-user)> (use-modules (srfi srfi-19))
> scheme@(guile-user)> (julian-day->date 0 0)
> $1 = # year: -4714 zone-offset: 0>
> scheme@(guile-user)> (julian-day->date -1 0)
> $2 = # year: -4714 zone-offset: 0>
> scheme@(guile-user)> (julian-day->date -10 0)
> $3 = # ye
scheme@(guile-user)> (use-modules (srfi srfi-19))
scheme@(guile-user)> (julian-day->date 0 0)
$1 = #
scheme@(guile-user)> (julian-day->date -1 0)
$2 = #
scheme@(guile-user)> (julian-day->date -10 0)
$3 = #
scheme@(guile-user)> (julian-day->date -1000 0)
$4 = #
Observe the various erroneous
