How To Export iCloud Calendar
In iCloud, calendars can be exported but only one at a time.
How to export iCloud calendar
Step 1. Visit www.icloud.com/calendar and log in to your iCloud account.
Step 2. On the left side of the page, hover your mouse over the calendar you want to export and click the Share icon.
Step 3. In the Calendar Sharing popup window, select the Public Calendar checkbox.
Step 4. Once the Public Calendar checkbox is selected, a calendar link will be generated - copy the link.
Step 5. Open a new tab in your browser and paste the link in the address field but do not open the link just yet. Select the beginning of the link where it says webcal.
Step 6. Change from webcal to http, and hit ENTER button on your keyboard.
The calendar will then be downloaded to your Downloads folder in .ics format.
After you have exported the calendars you require, you can turn off the public calendar sharing for iCloud calendars.