if (this.props.mode === ModeEnum.start) {
      // We know now the date prop is the start date and the otherDate is the end date in non smart mode
      // If this cell is after end date then invalid cell as this is the start mode
      if (cellDate.isAfter(this.props.otherDate, 'day')) {
        this.setState({ style: invalidStyle(this.props.darkMode) });