private void resetWeekdayIfNotSetByTrigger(Calendar calendar) {
        if (triggerEveryJSONObject.has("weekday")) return;
        calendar.set(Calendar.DAY_OF_WEEK, calendar.getFirstDayOfWeek());
    }
Set day to 1 if not set by trigger
@param calendar
src/android/trigger/TriggerHandlerEvery.java