Hi @MarcLasserre_GCS,

Thanks for your input.

Confirmed that there is no OOTB function to find the first and last business date of the month. 

Done this scenario with own java code. updating the same here for others reference. Thanks. 

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PublicAPI tools = ThreadContainer.get().getPublicAPI();

String toAddDate = "0";
String inputDate = year.concat(month);
String specificDateFormat = toAddDate.concat(specificDate);
String firstInputDay = inputDate.concat(specificDateFormat);

if ((year == null || year.isEmpty()) && (month == null || month.isEmpty()) && (specificDate == null || specificDate.isEmpty())){
  return null;
}

if (calendarName.equals("") || (calendarName == null)){
  calendarName="JPDefaultTest";
}

if ((calendarName != "JPDefaultTest") || (calendarName != null)){
   return null;
}

if (specificDate == "1"){
    String strFirstBusinessDay =  pega_rules_businesscalendar.addDays(firstInputDay, 0, true, calendarName);
    return strFirstBusinessDay; 
} else if (specificDate == "2"){
    int intYear = Integer.parseInt(year);
    int intMonth = Integer.parseInt(month);
    Calendar cal = Calendar.getInstance();;
    cal.clear();
    cal.set(intYear, intMonth, 1);
    cal.add(Calendar.DATE, -1);
    int day = cal.get(Calendar.DATE);
    String strDay = String.valueOf(day);
    String lastDay = inputDate.concat(strDay);
    if (pega_rules_businesscalendar.isBusinessDay(lastDay,"JPDefaultTest")){
       return lastDay;
    } else {
        do{
           cal.add(Calendar.DATE, -1);
          } while (cal.get(Calendar.DAY_OF_WEEK) == Calendar.SATURDAY
           || cal.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY );
        int Bussinessday = cal.get(Calendar.DATE);
        String strBussDay = String.valueOf(Bussinessday);
        String lastBussDay = inputDate.concat(strBussDay);
        return lastBussDay;
      } 
  }
return null;

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