Preferences preferences = new Preferences(this);
                int beginningOfMonth = preferences.getBeginningMonth();
                //Go back from today to the last <beginningOfMonth> before the oldest transaction
                while(calendar.get(Calendar.DAY_OF_MONTH)!=beginningOfMonth) {
                    calendar.add(Calendar.DAY_OF_MONTH, -1);
                }

                //Instance for end date
                Calendar end = Calendar.getInstance();

                do{
                    //We got the start date. Now add one month for the end date. If the end date falls after the current date, then set it to
                    //the current date
                    end.setTime(calendar.getTime());
                    end.add(Calendar.MONTH, 1);
                    end.add(Calendar.DAY_OF_MONTH, -1);
                    if(end.get(Calendar.YEAR)>comparator.get(Calendar.YEAR) || (end.get(Calendar.YEAR)==comparator.get(Calendar.YEAR) && end.get(Calendar.DAY_OF_YEAR)>comparator.get(Calendar.DAY_OF_YEAR))) {
                        end = Calendar.getInstance();
                    }

                    mDateInfos.add(new DateInfo(calendar.get(Calendar.YEAR), calendar.get(Calendar.DAY_OF_YEAR), end.get(Calendar.YEAR), end.get(Calendar.DAY_OF_YEAR)));

                    calendar.add(Calendar.MONTH, 1);
                } while (calendar.get(Calendar.YEAR)<comparator.get(Calendar.YEAR) || (calendar.get(Calendar.YEAR)==comparator.get(Calendar.YEAR) && calendar.get(Calendar.DAY_OF_YEAR)<=comparator.get(Calendar.DAY_OF_YEAR)));