To create an event, such as a talk in the latest version:
hugo new --kind event event/my-talk-name
Then edit the newly created file
content/event/my-talk-name/index.md with your full event title and details. Note that many of the event parameters are similar to the publication parameters.
Whereas prior to v5 Beta 2, you can create an event with:
hugo new --kind talk talk/my-talk-name