gistfile1.txt

    func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: cellIdentifier, for: indexPath) as! CalendarViewCell
        
        cell.dateLabel.text = self.calendarArray?[indexPath.row] as? String
        return cell
    }