Event is a task on Scheduler which is not Jira issue and not included into the schedule time.
To plan an event you can open planning dialog and select Event tab
Enter the details
Event name
Description
Start time and end time
Teams: Select team and add all its members into the event
Guests: Select single users and add to the event
Marker color: the color of will display on the scheduler
Hover over the event to edit/delete it
Event time log
Once the event is created you can log time for it in Timelog
You can also find the event in the timelog dialog