private void daysTillChristmas(){
    DateTime today = DateTime.today(TimeZone.getDefault());
    DateTime christmas = DateTime.forDateOnly(today.getYear(), 12, 25);
    int result = 0;
    if(today.isSameDayAs(christmas)){
      // do nothing
    }
    else if (today.lt(christmas)){
      result = today.numDaysFrom(christmas);
    }
    else if (today.gt(christmas)){
      DateTime christmasNextYear = DateTime.forDateOnly(today.getYear() + 1, 12, 25);
      result = today.numDaysFrom(christmasNextYear);
    }
    log("Number of days till Christmas : " + result);
  }