The events use the calendar nip. Not sure about everything else, but it probably doesn’t broadcast kind 1 events cause that would be a terrible decision for an app like this. 

 Nice thanks. Calendar events need more clients to adopt. @Fabian  does Nostur render these yet? 

 nostr:note1zxz2qprjhsm6zx3vl79y5rqzxc42k8p4fejr4g3h6k38vwc65xhqnjg40m