Use an online CSV-to-ICS converter, such as CSV to iCal Convertor. Upload your CSV file, following onscreen instructions. Choose a time zone and an output name and click the "Convert" button ...

To get started, drag files on top of the application interface, choose your output format, and then click the Convert button. Along the way, you can change the resolution and quality of the file.

Excel may return a serial number instead of a date; because it is stored thus in the backend. Learn how to convert Serial Number to Date.