Most modern Slavic languages (Bosnian, Bulgarian, Lower Sorbian, Macedonian, Montenegrin, Russian, Rusyn, Slovak, Slovene, and Upper Sorbian) have month names derived from Latin, but several (Belarusian, Croatian, Czech, Kashubian, Polish, and Ukrainian) have Slavic names. Although five of these languages are contiguous, there are no other shared distribution patterns for current Slavic month systems by Slavic branch, Catholicism versus Orthodoxy, past political affiliation, or typical adstrata. Isolated Latin names occur in Polish (marzec ‘March’, maj ‘May’) and Ka (môj …