Open Windows 10 Calendar application.
On the left you'll see a list of calendars.
If the list is closed, click to expand it.
Note that you may have more than one group, depending on how many accounts you have configured.
A list opens. It shows the calendars under that account.
Move the pointer on top of the calendar you wish to remove.
Updated Wed, 08 Feb 2023 12:08:23 +0000 UTC