Do I need to keep Calendar app open in order to be notified about calendar events

I think this question can be very trivial, but for some reason it seems extremely difficult to find a clear and explicit answer to this.

If I close the Calendar app (by selecting "Quit") and therefore its icon disappears from the Dock, is there still some daemon process running in the background and therefore I will still be notified about Calendar events? Or do I need to keep the app open?

For example, some apps like Microsoft Outlook must stay open in order to be notified about e-mails, therefore this is not necessarily something which is not needed to be said.

Ideally, is there any official or reliable source that says this? (e.g. official documentation)