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.

1. Download the .ics file to your computer Save or download the .ics file to your computer. It doesn’t really matter where you put it, so save it in downloads or wherever you'll easily find it.

Microsoft has rolled back a fix for a known Outlook issue that was causing incorrect security alerts when opening ICS calendar files after installing the December Outlook Desktop security updates ...