public void setMaxDayCharacters(int maxDayCharacters) {
		if (maxDayCharacters == this.maxDayCharacters) {
			return;
		}

		if (maxDayCharacters < 0 || maxDayCharacters > 4) {
			this.maxDayCharacters = 0;
		} else {
			this.maxDayCharacters = maxDayCharacters;
		}
		drawDayNames();
		drawDays();
		invalidate();
	}