code: function YearMonthForm({ date, localeUtils, onChange, fromMonth, toMonth }) {
      const months = localeUtils.getMonths();
  
      const years = [];
      for (let i = fromMonth.getFullYear(); i <= toMonth.getFullYear(); i += 1) {
          years.push(i);
      }
  
      const handleChange = function handleChange(e) {
          const { year, month } = e.target.form;
          onChange(new Date(year.value, month.value));
      };
  
      return (
          <form className="DayPicker-Caption">
              <select name="month" onChange={handleChange} value={date.getMonth()}>
                  {months.map((month, i) => <option key={i} value={i}>{month}</option>)}
              </select>
              <select name="year" onChange={handleChange} value={date.getFullYear()}>
                  {years.map((year, i) =>
                      <option key={i} value={year}>
                          {year}
                      </option>
                  )}
              </select>
          </form>
      );
  }
docs: Component will receive date, locale and localeUtils props