When you set up an iCalendar feed to share to another calendar program, you have the option to set up an iCal feed for one sub-calendar or all sub-calendars combined.
In some cases, you may want to share multiple sub-calendars from your calendar, but not all of them. You can set up a customized iCalendar feed with selected sub-calendars combined into one feed. Here’s how.
Create a custom iCal feed
To create a custom iCalendar feed with selected sub-calendars, you’ll first create a secure calendar link. Then you’ll open that calendar link to get the iCalendar feed URL.
Only calendar administrators can create the shareable link needed for this process.