message: Allow parsing %Ez to parse only 1 hour digit.
diff: @@ -5986,7 +5986,7 @@ from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
  if (modified == CharT{})
  read(is, rs{H, 2, 2}, ru{M, 2, 2});
  else
  - read(is, rs{H, 2, 2}, CharT{':'}, ru{M, 2, 2});
  + read(is, rs{H, 1, 2}, CharT{':'}, ru{M, 2, 2});
  if (!is.fail())
  temp_offset = hours{H} + minutes{M};
  command = nullptr;
  