-1;
  }
  var date = new Date();
  var argc = arguments.length;
  if (argc < 1) {
    return false;
  }
  var isGMT = arguments[argc - 1] == "GMT";

  if (isGMT) {
    argc--;
  }
  // function will work even without explict handling of this case
  if (argc == 1) {
    let tmp = parseInt(arguments[0]);
    if (isNaN(tmp)) {
      return (
        (isGMT ? date.getUTCMonth() : date.getMonth()) == getMonth(arguments[0])
      );
    } else if (tmp < 32) {
      return (isGMT ? date.getUTCDate() : date.getDate()) == tmp;
    }
    return (isGMT ? date.getUTCFullYear() : date.getFullYear()) == tmp;
  }
  var year = date.getFullYear();
  var date1, date2;
  date1 = new Date(year, 0, 1, 0, 0, 0);
  date2 = new Date(year, 11, 31, 23, 59, 59);
  var adjustMonth = false;
  for (let i = 0; i < argc >> 1; i++) {
    let tmp = parseInt(arguments[i]);
    if (isNaN(tmp)) {
      let mon = getMonth(arguments[i]);
      date1.setMonth(mon);
    } else if (tmp < 32) {
      adjustMonth = argc <= 2;
      date1.setDate(tmp);
    } else {
      date1.setFullYear(tmp);
    }
  }
  for (let i = argc >> 1; i < argc; i++) {
    let tmp = parseInt(arguments[i]);
    if (isNaN(tmp)) {
      let mon = getMonth(arguments[i]);
      date2.setMonth(mon);
    } else if (tmp < 32) {
      date2.setDate(tmp);
    } else {
      date2.setFullYear(tmp);
    }
  }
  if (adjustMonth) {
    date1.setMonth(date.getMonth());
    date2.setMonth(date.getMonth());
  }
  if (isGMT) {
    let tmp = date;
    tmp.setFullYear(date.getUTCFullYear());
    tmp.setMonth(date.getUTCMonth());
    tmp.setDate(date.getUTCDate());
    tmp.setHours(date.getUTCHours());
    tmp.setMinutes(date.getUTCMinutes());
    tmp.setSeconds(date.getUTCSeconds());
    date = tmp;
  }
  return date1 <= date2
    ? date1 <= date && date <= date2
    : date2 >= date || date >= date1;
}

function timeRange() {
  var argc = arguments.length;
  var date = new Date();
  var isGMT = false;
  if (argc < 1) {
    return false;
  }
  if (arguments[argc - 1] == "GMT") {
    isGMT = true;
    argc--;
  }

  var hour = isGMT ? date.getUTCHours() : date.getHours();
  var date1, date2;
  date1 = new Date();
  date2 = new Date();

  if (argc == 1) {
    return hour == arguments[0];
  } else if (argc == 2) {
    return arguments[0] <= hour && hour <= arguments[1];
  }
  switch (argc) {
    case 6:
      date1.setSeconds(arguments[2]);
      date2.setSeconds(arguments[5]);
    // falls through
    case 4:
      var middle = argc >> 1;
      date1.setHours(arguments[0]);
      date1.setMinutes(arguments[1]);
      date2.setHours(arguments[middle]);
      date2.setMinutes(arguments[middle + 1]);
      if (middle == 2) {
        date2.setSeconds(59);
      }
      break;
    default:
      throw new Error("timeRange: bad number of arguments");
  }

  if (isGMT) {
    date.setFullYear(date.getUTCFullYear());
    date.setMonth(date.getUTCMonth());
    date.setDate(date.getUTCDate());
    date.setHours(date.getUTCHours());
    date.setMinutes(date.getUTCMinutes());
    date.setSeconds(date.getUTCSeconds());
  }
  return date1 <= date2
    ? date1 <= date && date <= date2
    : date2 >= date || date >= date1;
}