Let's say I work in Japan and want to see the public holidays of Japan in my Calendar app. How can this be achieved without changing the region to Japan in "System Preferences > Language & Region", since this also changes many other behaviours?
MacBook Pro 15″, macOS 12.6
Think this following link from Apple may provide the answer to your question >>
Show or hide the Holidays calendar on Mac
View the Holidays calendar for a different region
You can change your computer’s settings to show holidays for a different country or region.
> System Preferences, click Language & Region 
, then choose your region.
on your Mac, choose Calendar > Preferences, then click General.Then try is one which may or may not provide the answer the use wants to hear
Link below
This doesn't answer my question though. As I explained above, I would like to see public holidays from a country that is not the same as the one specified as Region in the Language & Region system preferences.
You are welcome 😀 and thank you too 🇨🇦
Do come back to the Apple Support Communities ( ASC ) in the future, if / or when additional questions may arise
Sorry but the answer provided is obviously not the answer the user wanted
This seems good enough. Thanks!
How to import public holidays in Calendar app without changing region settings
