Hi douglas_m,
The format that you have exported from Google is for use with spreadsheets and text editors, not calendar applications:
Tab-delimited text, also known as tab-separated values (TSV), is a format that can be created or viewed by most spreadsheet programs and text editors
I found another support article from Google that explains how to export asan .icsfile.
https://support.google.com/calendar/answer/37111?hl=en
Export events from one calendar
- On your computer, open Google Calendar. You can only export from a computer, not a phone or tablet.
- On the left side of the page, find the My calendars section.
- To the right of the calendar you want to export, click the dropdown menu > Calendar settings.
- Click Export this calendar.
- An ICS file of your events will start downloading.
Hopefully this information, or another on the Google support site, will help you with this.
Take care,