How to export a Google Calendar as a file that you can import into another calendar.

1. Open Google Calendar on a computer (you cannot export a calendar via the mobile app).
2. In the panel on the left of the page, click to expand the My calendars list.
   
3. Next to the calendar that you want to export, click the three dots icon to open the Options list.
   
4. Click Settings and sharing.
   
5. Click Export Calendar.
   
6. A calendar file will download to your computer. You can import this into another calendar.