Selecting another month by using selectOtherMonths does not work.

Trying to select another month by activating selectOtherMonths does not work.

If you select a date of the previous month, it selects that date of the current month. If you select 31 of the last month, the first day of the next month is selected instead.

After looking at the code and testing, I have found a fix by adding the following after line 867 in _selectDay:

if (month != inst.selectedMonth) {
  if (month > inst.selectedMonth && year < inst.selectedYear)
    this._adjustDate('#datepicker', -1, 'M');
  else if (month < inst.selectedMonth && year > inst.selectedYear)
    this._adjustDate('#datepicker', +1, 'M');
  else if (month > inst.selectedMonth)
    this._adjustDate('#datepicker', +1, 'M');
  else if (month < inst.selectedMonth)
    this._adjustDate('#datepicker', -1, 'M');
}