No October 30, 2166

[langelgjm]

When trying to solve a logic puzzle, I ran across the following issue - October 30, 2166 seems not to exist!

?- form_time(gregorian(2166, 10, 29)).
true.

?- form_time(gregorian(2166, 10, 30)).
false.

?- form_time(gregorian(2166, 10, 31)).
true.

However, the following works:

?- gregorian(2166, 10, 30).
Correct to: "julian_calendar_gregorian:gregorian(2166,10,30)"? yes
true.

Version: SWI-Prolog (threaded, 64 bits, version 8.0.1)

[mndrix]

Good catch, and thanks for the report.

I'm not currently using julian or Prolog, so I probably won't get around to debugging this myself. Sorry. I'll leave the issue open in case anyone else is interested in tracking down a fix.