Seems it's not possible, even though "No edit restrictions defined for this calendar".
Alternatively, how to find out who created a particular calendar?
This question applies to the Confluence Team Calendar plugin.
You can change the name of your calendar for yourself, but you cannot change the 'global' name of the calendar (even as the creator). Once the calendar is named, that is it.
Take a look at this thread, it also contains a link to the feature request:
Hi team, I’m Avinoam, a product manager on Confluence Cloud, and today I’m really excited to let the Community know that all customers can now try out the new editing experience and see some of the ...
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