builder.appendMonthOfYearShortText();
break;
case 'B':
// Full month name in the current locale. (Also matches
// abbreviated name on input.)
builder.appendMonthOfYearText();
break;
case 'c':
// Date and time. Locale-specific on output, ‘"%a %b %e
// %H:%M:%S %Y"’ on input.
throw new UnsupportedOperationException("%c not yet implemented");