Welcome to scsh 0.6.1 (Combinatorial Algorithms) [beta
Type ,? for help.
> (date->string (make-date 1 1 1 1 1 102))
(call-external-value "format_date" #f)
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You cannot apply date->string to dates that were created by
the default arguments of make-date. As the manual points
out, such dates are useful when passed to time. It seems
like they are not useful as parameters for date->string.
Maybe the manual should be more explicit about this.