how to add multiple calendars under the same ID?

You can create a feed for each calendar, and then list all the feed IDs, separated by commas, in the widget. To get the right calendar ID for each calendar, see https://wpdocs.philderksen.com/google-calendar-events/getting-started/find-calendar-id/

[email protected],[email protected],[email protected]

Like this?, yea that doesn’t work.

Calendar ID: [email protected]
which part or all?

Good start. Now that you’ve copied the Calendar ID, put that into the Feed Settings, where it says “Google Calendar ID.” The next step is to pull out the four-digit number that gets created, where it says “Feed Shortcode”. Put the four-digit numbers, separated by commas, in the widget.

Nice, thank you!

Thanks @aparente001.

Sounds like this is resolved so I am gonna close it. Let us know if you have any more questions.

Thanks!