static bool MatchMonth(ICharSequence month, ICharSequence txt, int tokenStart) => AsciiString.RegionMatchesAscii(month, true, 0, txt, tokenStart, 3);
static bool MatchMonth(ICharSequence month, ICharSequence txt, int tokenStart) => AsciiString.RegionMatchesAscii(month, true, 0, txt, tokenStart, 3);