You would think that if they had a conference listed once for 2015, then you would see the same conference again in 2016, 2017, etc....
But so many here in Austin would appear to have been entered only once, and never again.
Sad.
If you know the conference info you can add it via a PR. I am sure they would appreciate the updates.
Sorry this didn't have up-to-date info for the conferences you were looking for. As suggested would love any PRs. The intent with this release is to get others in the community involved and make the process of creating an event that's managed through github as effortless as possible.