December 20 5114
The map generating algorithm breaks on this date.
Define "break". The map certainly looks aberrant, but it is still playable. All capabilities of all units are present. It's maybe an ultra-hard map, but it sure isn't "broken" by the customary definition.
Neither broken nor ultra-hard. Good fun, though - thanks for highlighting it :)
First a Rectangular block of Ice and now a rectangle in the Chronom. Hmm...