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I have a time interval consisting of a beginning and an end date. I have a way of letting the user set these dates through DatePickerDialogs. Here is the code of the method that creates and shows the dialogs: private void editInterval(boolean beginning) { DatePickerDialog dpd; Calendar cal = Calendar.getInstance(); if (beginning) { dpd = new DatePickerDialog(this, new DatePickerDialog.OnDateSetListener() { @Override public void onDateSet(DatePicker view, int year, int monthOfYear, int dayOfMonth) { someTimeDuringYear1 = year; someTimeDuringMonth1 = monthOfYear + 1; someTimeDuringDay1 = dayOfMonth; Calendar cal1 = Calendar.getInstance(); cal1.set(Calendar.YEAR, year); cal1.set(Calendar.MONTH, monthOfYear); cal1.set(Calendar.DAY_OF_MONTH, dayOfMonth); Calendar cal2 = Calendar.getInstance(); cal2.set(Calendar.YEAR, someTimeDuringYear2); cal2.set(Calendar.MONTH, someTimeDuringMonth2); cal2.set(Calendar.DAY_OF_MONTH, someTimeDuringDay2); if (cal1.getTimeInMillis() > cal2.getTimeInMillis()) { someTimeDuringYear2 = someTimeDuringYear1; someTimeDuringMonth2 = someTimeDuringMonth1; someTimeDuringDay2 = someTimeDuringDay1; } updateSomeTimeDuring(); editDepartureInterval(); } }, someTimeDuringYear1, someTimeDuringMonth1 - 1, someTimeDuringDay1); dpd.setTitle(getString(R.string.beginning_of_interval)); cal.add(Calendar.MONTH, 6); dpd.getDatePicker().setMaxDate(cal.getTimeInMillis()); cal.add(Calendar.MONTH, -6); cal.add(Calendar.DATE, 2); dpd.getDatePicker().setMinDate(cal.getTimeInMillis()); } else { dpd = new DatePickerDialog

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