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 ...

Avoid manually entering events. It's easy to add iCal invites (.ics files) to your Google calendar if you follow these simple steps.

macOS 10.14.6. When I make reservations at OpenTable.com, I have the option to add it to my calendar on my Mac via a downloadable .ics file, the contents of which are: If I double-click it, it ...